| ADAIR: | from the ford by the oak trees |
| AHERN, AHEARN: | lord of the horses |
| AILBE: | meaning unknown |
| AILILL: | myth name (king of Connaught) |
| AIRELL: | nobleman |
| ALAN, ALLEN, ALLAN, ALLYN: | handsome |
| ALANSON: | son of Allan |
| ANGUS, ANGHUS, AENGUS, AONGHUS: | exceptionally strong |
| ANNA, ANANT: | from the stream |
| ANSGAR: | warrior |
| ANWELL, ANWYL: | beloved |
| ANYON: | anvil |
| AOD: | myth name (son of Lyr) |
| AP OWEN: | son of Owen |
| ARAWN: | myth name (king of the Underworld) |
| ARGYLE: | from the land of the Irish |
| ARLEN, ARLIN, ARLYN, ARLAN: | oath |
| ARTHUR, ARTUR, ART, ATTY, ATTIE, ARTURO: | strong as a bear |
| BAIRD: | bard |
| BARRY, BAIRRFHIONN, BARRA, BEARACH, BEARCHAN: | good marksman |
| BEACAN, BECAN: | small |
| BEDWYR: | Arthurian legend name |
| BENDIGEIDFRAN: | name of a king |
| BEVAN, BEVIN, BEVYN: | young soldier |
| BLAINE, BLAYNE, BLANE, BLAINEY, BLAYNEY: | slender |
| BLAIR: | from the plain |
| BOADHAGH: | meaning unknown |
| BOWDEN, BOWDYN, BODEN, BODYN, BOYDEN, BOYD: | blond |
| BOWEN, BOWYN: s | on of Owen |
| BOYNTON: | from the white river |
| BRAN, BRANN: | raven |
| BRASIL, BREASAL, BASIL: | battle |
| BREANAINN, BREANDAN, BREDON, BRANDAN: | sword |
| BRENDAN, BRAN, BRAM, BROIN, BRENNAN: | raven |
| BRETT, BRET: | a Breton |
| BRIAN, BRYAN, BRYANT, BRIANT: | strong |
| BRICE, BRYCE: | swift |
| BRICRIU: | myth name (the poison-tongued) |
| BRITOMARTUS: | meaning unknown |
| BURGESS: | citizen |
| CACHAMWRI: | legend name (a servant of Arthur) |
| CADELL: | warring |
| CADMAN: | fighter |
| CALDER: | from the stony river |
| CALUM: | dove |
| CAMERON, CAMERO, CAMEY: | crooked nose |
| CAOIMHGHIN: | gentle |
| CARADOC: | dearly loved |
| CARDEW: | from the black fort |
| CAREW, CAREY, CARY: | from the fortress |
| CARNEY, CAR, CARR, CATHAOIR, CATHAIR: | fighter |
| CARROL, CARROLL: | champion |
| CASEY: | brave |
| CASSIVELLAUNUS, CASWALLAN: | Arthurian myth name |
| CATHAL, CAHAL, CONALL, CONNELL: | strong in battle |
| CATHBAD: | meaning unknown |
| CEDRIC: | chief |
| CELYDDON: | myth name (father of Culhwch) |
| CHAD: | defense |
| CLUST: | myth name (son of Clustfeinad) |
| CLUSTFEINAD: | myth name |
| COCIDIUS: | myth name (a hunter god) |
| COINNEACH: | handsome |
| CONALL: | myth name (Ulster chieftain) |
| CONALL CERNACH: | myth name (Ulster chief) |
| CONAN, CONANT, CON, CONN, CUINN: | wise |
| CONCHOBAR: | myth name (a hero) |
| CONDAN, CONDON: | dark-haired wise man |
| CONLAOCH: | meaning unknown |
| CONN: | myth name (son of Lir) |
| CONNLA: | myth name (son of Conn) |
| CONROY: | persistent |
| CONWAY: | hound of the plain |
| CORANN: | myth name (a druid) |
| CORMAC, CAIRBRE, CARBRY: | charioteer |
| CRADAWG: | myth name (son of Bran) |
| CUCHULAIN: | myth name (the Hound of Ulster) |
| CULAIN, CULANN: | myth name (the smith) |
| CULHWCH: | meaning unknown |
| CULLEN: | cub |
| CUSTENNIN: | myth name (a giant) |
| CYNYR: | meaning unknown |
| DALLAS: | dwells by the waterfall |
| DAMAN: | demon |
| DARCY: | dark |
| DEARG: | son of Daghda |
| DERMOT: | free |
| DESMOND: | from south Munster |
| DEVIN, DEVYN: | poet |
| DILLION: | faithful |
| DINSMORE: | from the hill fort |
| DOANE: | from the sand hill |
| DONALD, DON, DOYLE, DOY, DUGHALL, DOUGAL, DOUGHAL: | dark stranger |
| DONAT, DONAL, DOMHNALL, DONALL, DORAN, DORRAN: | stranger |
| DONNALLY, DONNELLY: | brave, dark man |
| DONNCHADH, DONOGH, DONAGHY, DONOVAN: | strong fighter |
| DOUGHLAS, DOUGLAS: | dwells by the dark stream |
| DREM: | myth name (son of Dremidydd) |
| DRISCOLL, DRISCOL, DRISKELL: | interpreter |
| DRUCE: | wise |
| DRUDWYN: | myth name (Mabon's dog) |
| DRUMMOND: | lives on the hill top |
| DUANE, DEWAIN, DWAYNE: | song |
| DUER: | hero |
| DUFF, DUBV, DUFFY: | dark-faced |
| DUNCAN, DUNHAM: | dark-skinned fighter |
| DYFED: | from Dyfred |
| EA, EDAN: | fire |
| EBURACON: | lives near the yew-tree estate |
| EFNISIEN: | myth name (son of Euroswydd) |
| EGAN, EGHAN: | ardent |
| EGOMAS: | meaning unknown |
| EINION: | anvil |
| ELIDOR: | myth name (a monk) |
| EMRYS: | Celtic form of Ambrose (immortal) |
| ERIM: | meaning unknown |
| EVAN: | young fighter |
| EVNISSYEN: | meaning unknown |
| EWEN, EWAN, EWYN, EOGHANN, EOIN: | young |
| FARREL, FARRELL: | brave |
| FERCHAR: | myth name (son of Uisnech) |
| FERDIAD: | meaning unknown |
| FERGHUS, FERGUS, FEARGHUS: | manly |
| FERRIS: | rock |
| FIACRE, FIACRA: | eagle |
| FIALLAN: | meaning unknown |
| FIAMAIN: v meaning unknown | |
| FINBAR, FINNBAR, FYNBAR, FINNOBARR: | blond |
| FINIAN: | handsome |
| FINN, FINGAL: | myth name |
| FLOYD: | gray |
| FORSA: | meaning unknown |
| GALL: | stranger |
| GALVIN, GALVYN: | sparrow |
| GELBAN: | meaning unknown |
| GILDAS: | serves God |
| GILMORE: | serves Mary |
| GILROY: | serves the red-haired lord |
| GIRARD: | meaning unknown |
| GLEN, GLYN, GLENN: | from the valley |
| GLIFIEU: | myth name (son of Taran) |
| GORSEDD: | myth name (from Arberth) |
| GRUDDIEU: | myth name (son of Muriuel) |
| GUY: | sensible |
| GWALCHMAI: | myth name, Arthurian legend (Gawain) |
| GWAWL: | myth name (son of Clud) |
| GWEFL: | myth name (son of Gwastad) |
| GWERN: | myth name (son of Matholwch) |
| GWERNACH: | myth name |
| GWRI: | of the golden hair |
| GWYNHAM: | myth name (father of Teithi) |
| HAFGAN: | myth name |
| HALWN: | meaning unknown |
| HEFEYDD: | myth name (father of Rhiannon) |
| HEILYN: | myth name (son of Gwyn) |
| HENBEDDESTR: | fastest man |
| HENWAS: | myth name (brother of Henbeddestr) |
| HERNE: | myth name (a hunter god) |
| HOEL: | meaning unknown |
| HUARWAR: | myth name (son of Halwn) |
| HUEIL: | myth name (son of Caw) |
| HUON: | meaning unknown) |
| IDEN: | wealthy |
| INNIS, INNESS: | from the island |
| IRVIN, IRVEN, IRVYN, IRVING: | white |
| KALEN, KAILEN, KALAN, KALLAN, KHEELAN, KELLEN: | Irish/Celtic name meaning "warrior." |
| KANE, KAYNE: | intelligent |
| KARNEY, KEARNEY: | fighter |
| KEANE, KEENE: | tall and handsome |
| KEGAN, KEEGAN, KEAGHAN: | son of Egan |
| KEIR: | dark-skinned |
| KELVIN, KELVYN, KELWIN, KELWYN: | from the narrow river |
| KENDALL, KENDAL, KENDHAL: | from the bright valley |
| KENNETH: | handsome |
| KENT, KENTIGERN: | head chief |
| KERMIT, KERMODE: | son of Diarmaid |
| KERRY, KEARY: | dark |
| KERWIN, KERWYN, KIRWIN, KIRWYN, KIERAN: | dark-skinned |
| KEVIN, KEVYN, KEVAN: | gentle |
| KILLIAN, KILIAN: | blind |
| KUNAGNOS: | wise |
| KYNTHELIG: | myth name (a guide) |
| LAIRGNEN: | myth name (of Connaught) |
| LEE, LEIGH: | healer |
| LEITH: | meadow |
| LESLEY, LESLIE: | from the gray fortress |
| LINCOLN: | from the settlement by the pool |
| LIR: | a mythical king |
| LLEWELYN: | ruler |
| LLOYD: | gray |
| LLYR: | a mythical king |
| LUXOVIOUS: | myth name (god of Luxeuil) |
| MABON: | myth name (god of youth) |
| MAC, MACK: | son of |
| MACCUS: | hammer |
| MACKLIN, MACKLYN: | son of Flann |
| MADDOX, MADDOCK: | beneficient |
| MALCOLM: | servant of Saint Columba |
| MALVIN, MALVYN, MELVIN, MELVYN, MELVILLE: | leader |
| MATHOLWCH: | myth name |
| MEDR: | myth name |
| MEDREDYDD: | myth name (son of Medredydd) |
| MENW: | myth name (a wizard) |
| MERLIN, MERLYN: | from the hill over the sea |
| MORFRAN: | myth name (an ugly demon) |
| MORGAN, MORVEN, MORVYN, MARINER, MARVIN, MARVYN, MORYN, MURRAY, MURRY: | lives by the sea |
| MUNGO: | lovable |
| MURDOC, MURDOCH, MURDOCK: | seaman |
| MURTAGH: | protects the sea |
| MYNOGAN: | myth name (father of Beli) |
| NAOIS: | myth name (a warrior) |
| NEAL, NEIL, NEALON, NELL, NEALE, NIALL, NEILL, NIALLAN, NYLE: | champion |
| NELS: | chief |
| NELSON: | son of Neil |
| NEMAUSUS: | myth name (god of Nimes) |
| NEWLIN, NEWLYN: | from the new spring |
| NIECE, NEESE: | choice |
| NISIEN: | myth name (son of Euroswydd) |
| NOLAN, NOLAND: | noble |
| ORIN, ORAN: | white |
| OSCAR, OSKAR, OSKER, OSCKAR: | jumping fighter |
| OSSIAN, OISIN: | meaning unknown |
| OWEN, OWIN, OWYN: | young fighter |
| PENDARAN: | meaning unknown |
| PERTH, PERT: | from the thorn-bush thicket |
| PHELAN: | wolf |
| POWELL: | son of Howell |
| PRYDERI: | care |
| PWYLL: | myth name (lord of Annwn) |
| QUIN, QUINN: | wise |
| REGAN, REGHAN, REAGAN, REAGHAN: | regal |
| RIVALIN: | meaning unknown |
| RONAN | oath |
| ROY: | red-haired |
| SATIVOLA: | name of a saint |
| SAWYER: | cuts timber |
| SCILTI: | legend name (messenger of Arthur) |
| SETANTA: | myth name (son of Sualtam) |
| SHERIDAN: | untamed |
| SIDWELL: | meaning unknown |
| SLOAN, SLOANE: | fighter |
| SUGN: | myth name (son of Sugnedudd) |
| TADHG: | myth name (a prince of Munster) |
| TALIESIN: | myth name (a bard) |
| TANGUY: | fighter |
| TARAN: | meaning unknown |
| TEAGUE, TEAGHUE: | bard |
| TEIRTU: | meaning unknown |
| TEITHI: | myth name (son of Gwynham) |
| TEGID: | meaning unknown |
| TEYRNON, TIERNAN, TIERNAY: | regal |
| TORREY, TORY: | lives by the tower |
| TRAHERN: | strong as iron |
| TREMAYNE, TREMAINE: | from the town encircled by stone |
| TREVOR: | wise |
| TUIREANN: | meaning unknown |
| TURI: | |
| TWRCH, TRWYTH: | myth name |
| UCHDRYD: | myth name (Crossbeard) |
| UISNECH, USENECH: | meaning unknown |
| USK-WATER: | meaning unknown |
| VARDEN, VARDON: | from the green hill |
| VARNEY: | from the alder grove |
| VAUGHN: | small |
| WEYLIN, WEYLYN: | son of the wolf |
| WYNNE: | fair |
| YORK: | yew-tree |
| YSPADDADEN: | myth name (father of Olwyn) |
