A:
Aderyn - Bird
Aelwen - fair brow
Aerona - like a berry
Aeronwen - from the river in Cardiganshire on which Aberaeron stands
Afanen - Raspberry
Alaw - Melody
Aldyth - from the old english "Ealdgyth"
Alis - Welsh form of Alice
Anchoret - much loved
Aneira - truly white, or truly golden (snow)
Anest - daughter of Gruffydd ap ynan and Angharad in the 12th century
Angharad - greatly loved one
Anwen - very fair
Aranrod - silver disc
Aranwen: fair, blessed, shining, holy
Arddun - beautiful
Arianwen - silver shire
Arwenna: muse
Aurddolen - golden link
Awel - breeze
Awen - the muse
Awena - poetry, prophecy

B:
Banon: from a word meaning queen
Berth : beautiful
Berthog: wealthy
Bethan: consecrated to God'; Welsh version of Elizabeth.
Blanchfleur: name of Perceval's sister, who was a healer
Blodeuwedd: Appearance of flowers
Blodwen: shining flower, holy
Braith: freckled
Brandgaine: maid to Isolde; she administered the love potion that bound Tristan and Isolde together forever
Branwen: white bosomed, or a girl with black hair and white skin
Briallen: primrose
Brisen: a great enchantress who brought about the birth of Galahad by drugging Lancelot and told him that Elaine was actually Guinevere
Bronwen: shining breast, holy
Buddug: victory; Welsh version of Victoria
Brynn: hill

C
Carys - to love
Catrin - welsh form of Catherine
Ceindeg - elegant, fair
Ceindrych - elegant sight
Ceinwen - elegant , fine
Ceiros - cherries
Ceri - to love
Cerian - to love
Ceridwen - mother of Taliesin and the goddess of poetic inspiration
Ceril - to love
Ceris - to love
Creuddylad - Welsh form of Cordelia, meaning heart, rope, or a sea jewel
Crisiant - crystal
Cristyn - follower of Christ
Crwys- from crosses

D
Degannwy - a village in Caernarvonshire, site of Llewelyn Fawr's castle
Delyth - pretty
Dilys - genuine, sincere
Dolan - Dark haired
Drudwen - precious
Dwynwen: Celtic god of Love, also a saint
Dyfi - a river in Montomeryshire
Dyfyr - Golden Haired one

E
Ebrill - April, one born in April
Ebrilla - April
Efa — Welsh version of Eve, meaning life
Eheubryd — a legendary name belonging to the daughter of Kyvwich
Eigra - fair maiden
Eira - snow
Eirian - brilliant, fair
Eirianwen - splendid, bright, shining, holy
Eiriol - snow or snowdrop
Eirlys - snowdrop
Eiry - snow
Eirys - iris
Elain - hind, fawn
Elaine - the Lady of Shallot, also Elaine "the White" who loved Sir Lancelot, but died because he did not love her in return
Elen - Welsh form of Helen, meaning "light"
Eleri – very bitter, name of a river and a 5th century saint
Elinor - Welsh form of Eleanor, meaning light or mercy
Ellylw - legendary name belonging to the daughter of Neol Hang Cock
Eluned – very desired, name of a handmaid of the Lady of the Fountain in the King Arthur legends, whose beauty and intelligence were legendary
Elwy - benefit
Elwyn - white-browed
Eneuawy — legendary name, and the name of the daughter of Bedwyr
Enfys - rainbow
Enid: From the word meaning soul, life or spirit
Enrhydreg — daughter of Tuduathar of Welsh legends
Epona — known to all Celts as the Divine Horse and Great Mare, she was a goddess associated with horses, their breeding, and all warriors who used horses
Erdudvyl - daughter of Tryffin of Welsh tales
Eres - wonderful
Eryl – watcher/guardian of the sea
Essyllt - she who is gazed at
Eswen - strength
Esyllt - of fair respect
Ethni - a heroine of irish legend
Eurfron - golden breasted
Eurliw - golden colour
Eurneid - daughter of Clydno in Welsh tales
Eurolwyn - daughter of Gwydolwyn in Welsh legends
Eurwen - fair and golden
Eyslk - fair

F
Faleiry - Welsh form of Valerie
Ffion - rose or finger of foxglove
Fflur - flower
Ffraid - welsh form of Bridget
Ffransis - welsh form of Frances

G
Gaenor: smooth, light colored
Gaerwn - a place name, literally white fort
Glain - jewel
Glenda - good, holy
Glenwen - holy, fair
Glenys - holy, fair
Glesni - blueness, blue sky
Glynis - little valley
Goewin - sprightly
Guinevere - the fair wife
Gwalia - Wales
Gwawl - light
Gwawr - dawn
Gwawrddydd - dawn of day
Gwen - white, fair
Gwenda - fair and good
Gwendolen - blessed or fair
Gwendydd - the morning star
Gwener - friday in welsh
Gwenfair - blessed mary
Gwenfor: fair, great
Gwenfron - fair breasted
Gwenhwyfar: Fair and yielding
Gwenifer: white wave
Gwenllian - white, fair and flaxen
Gwennan - fair, blessed
Gwennant - fair stream
Gwenno - a form of Gwen
Gwennog - smiling
Gwennol - white fronted, the swallow
Gwenonwy - lily of the valley
Gwerfyl - Poet of 15th C. Powys, one of the few early Welsh women poets whose work has been preserved
Gwladus - ruler
Gwlithyn - dew-drop
Gwylan - seagull
Gwylfai - festival of may
Gwyneira - white snow
Gwyneth - white, fortunate, blessed

H
Haf - summer
Hafina - from Haf
Hafryn - the river Severn
Hafwen - beauty of summer
Heddwyn: from the Welsh meaning "fair" and "peaceful"
Hefina: feminine form of Hefin, meaning sunshine
Heledd: name of a semi-mythical 7th century Welsh princess
Heulwen - sunshine
Hiral - long brow

I
Ilar - welsh fom of Hilary
Iona: Name of a flower, purple jewel
Iorwen - lord, beautiful

L
Lili - welsh form of Lily
Linette: From a Welsh word meaning "idol"
Lilybet - God's promise
Lona: Blackbird
Lowri - welsh form of Laura, meaning crown of laurels
Luned: Idol
Lyn - dimunutive of Llywelyn
Lyneth - from the french name Lynette
Lynwen: Fair image
Lysanor: Mother of one of Arthur's illegitimate sons
Llawela - lightning
Lleucu - welsh form of Lucy
Llian - flaxen, linen
Llinos - The linnet bird
Llio: originally a nickname of Gwenllian, but now its own name

M
Mabli - welsh form of Mabel, meaning lovely maiden
Mabyn - youthful
Madlen: Variation of Magdala, meaning woman of Magdala
Maelona: princess
Maglona - roman name for Mahynlleth
Mai - welsh form of Mary
Mair - Welsh form of Mary
Mairwen - Fair mary
Mali - welsh form of Molly
Manon: wished for child, or bitter
Marged - diminutive of Margaret
Mari - from Mary, meaning bitter
Megan - from Margaret, meaning pure
Meinir - maiden
Meinwen - slender and fair
Melangell - sweet angel
Meleri - grandmother of St David
Menai - the menai straits
Mererid - precious stone
Meriel: Shining sea
Meryl: sea-bright
Mona - Angels eyes
Morwen - maiden
Mwynwen - gentla and fair
Myfanwy - my fine one

N
Nant - stream
Nerys - feminine from Ner, meaning lord
Nest Non
O
Olwen - white foot-print
Owena - well born

R
Rowen: After the tree of the same name
Rhiain - maiden
Rhian - from maiden
Rhianwen: Comely maiden
Rhiannon: A mythological nymph
Rhonwen: Fair lance, fair, slender
Rhosyn: Rose

S
Saeran - an irish saint
Seren: Star
Sian - welsh form of Jane, meaning merciful and gracious
Siwan - Welsh form of Joan
Sulwyn - fair as the sun

T
Tegan - beautiful
Teleri - from the river Tyleri, Monmouthshire

V
Valmai - may-flower

W
Wynne - fair, blessed