In Irish it's "Ó hUaine"
ANOTHER ANSWER:
The following names are listed as Irish Gaelic versions of the surname Green(e) in Fr. Woulfe's book of Irish surnames:
de Graoin (of English origin) Limerick, Dublin, Waterford
Ó hUaithne/Ó hUainidhe of W. Cork
Ó hUaithnín of Mayo, Tipperary, Clare
Mac Glasáin/Mac Glaisín of Derry and Louth-Armagh-Monaghan-Fermanagh
Mac Giolla Ghlais of Donegal
Uaithne "some parts of Ireland"
Glas "some parts of Ireland"
Ó hUidhrín in parts of W. Mayo-W. Galway
Ó Fathaigh in some parts of Galway
green (the color)
The Irish (Gaelic) version is 'Croí Ró-Naofa'. Scottish Gaelic: ?
glas / uaine
Dear Green Place
Glas, pronounced like gloss. Also uaine.uaine green glas grey (green in certain uses)
In Irish it's "pláinéad glas"
blue, green grey comes from gaelic for glas
piosa beag de glas
Tá an léine sin go deas
The Celtic translations for "green" are: Irish - "glas", Scottish Gaelic - "uaine", Welsh - "gwyrdd", and Breton - "glaz".
In the Irish, spelled 'tulach', it means a low hill, hillock, mound'. In Scottish Gaelic it's also 'tulach' ( a small green hill).
Cnoic Glasa is the Irish. "Is glas iad na cnoic i bhfad uainn" (Far away hills are green, Irish proverb).Scottish Gaelic: ?