Only in the name. The structure itself is a plausible interpretation of what an important sanctuary could have been in the British Isles. Not based on a particular site but a synthesis of several sites.  

Reminds me of   

very nice game - and persians are very perfect and better of total war i love u guys slope

For Hibernians there is not that much material; althoug there are few things that could be used to set them apart.       Ceremonial headdress (for heroes and maybe even champions   https://arthistoryleavingcert.com/pre-christian-ireland-2/iron-age-la-tene-in-ireland/ http://www.visual-arts-cork.com/irish-crafts/petrie-crown.htm Cork horns (probably attached to a headdress)   EB2 Irish units (avoid EB1 units some were very innaccurate) https://europabarbarorum.fandom.com/wiki/Bodina_(Goidelic_Skirmishers)   https://europabarbarorum.fandom.com/wiki/Kladibiakoi_(Goidelic_Swordsmen)   https://europabarbarorum.fandom.com/wiki/Eqoreda_(Goidelic_Cavalry)  

The Britons currently have an Irish wonder. If Hibernians becomes their own civ perhaps Britons could get a new wonder in the future (based on this? https://en.wikipedia.org/wiki/Maiden_Castle,_Dorset).