In Latin, Felicia means "happy, lucky, and fortunate." Because Ireland was part of the Roman Empire, Gaelic (Irish) language roots are largely Latin; therefore, in Irish the meaning would be the same.
Both "Simkha" (שמחה) and "Felicia" mean happiness.
Felicia comes from Feliz which means "happy".
You mean Alesha Dixon?
There is no Felicia in Sword Art Online, if you mean Alicia then her relationship to Kirito is simply that of a fellow player.
'Will' is not an Irish word and has no meaning in Irish.
It doesn't mean anything in Irish.
It doesn't mean anything in Irish.
Nikko doesn't mean anything in Irish.
If you mean the Irish (Gaelic) it is not in that language. Irish has neither 'k' nor 'y' in its alphabet.
Felicia means happy, excited, joyful, energetic, goofy, and most of all . If you are a Felicia then you should become more than likely to be happy.
It doesn't mean anything in Irish: it's not an Irish name. I believe it's French.
"Isabelle" doesn't mean anything in Irish, but the Irish version of the name is Sibéal (shibael).