Just to let you know, some of those definitions aren't quite right. I don't know how much that matters to you but if it's important then you should know before you name your child. I've provided some similar sounding alternatives you might consider since you haven't finalised it yet.

Aidan- Is a nickname for a masculine name meaning fire, was the name of an Irish monk and saint as well as many male historical figures in it's non-nickname form. Aside from what it means, this is one of the trendiest, most popular, overused, male names in existance right now, and has spawned a huge trend of rhyming names. Adeline, Adelaide, Adele, and Adela, all mean "noble" and are female and much less trendy. Adanna is also a female name, although it's from a different culture then you seem to have been aiming for. Aida/Ayda mean returning or visitor.

Cailin- literally means girl, and is not actually used as an Irish name. That said, it's still the best on this current list (I hope you're pronouncing it colleen and not kaylin!) You could try Colette, which I prefer as a nickname for Nicolette but I think it can stand on it's own, means victory of the people. If you were saying "kaylin" you can try Katherine or Caitlin, although they (especially C/Kaitlin) are quite popular.

Kayley has no meaning and no history as a name, it is simply a highly popular combination of "Kay" (which is a male name) and the sound "lee." Extremely trendy now, as well as being made up. Same name suggestions as Cailin.

Quinn is a surname which has been used as a first name on boys. it means "male chief," and comes from Conn/Cuinn angliscised, therefore the resemlance to queen is purely coincidental and meaningless. Try Cynthia (means the goddess artemis) Kiana (means divine), or Quyen (means bird).

Regan Are you intentionally naming for the shakespeare character? She wasn't very nice, you know... And it's a lot more likely this is a misspelling of Reagan, which is once again a surname and occasionally a masculine given name. And it means "impulsive." Consider Regina (queen) or Renata (born again).

Riann Misspelling of something- either Ryan or Rhian depending on how you're saying it. Rhian is pretty, it means maiden (so it's female), Rhiannon is even better and means great queen, you can always use rhiann as a nickname for it, and I think Riannon may also be a legitimate spelling so you could still call her Riann. Renee is also nice, it means "born again."

Sheridan again is primarily a surname that has occasionally been used on males. It means "searcher." Shira is lovely and means poetry or singing, Shirin means sweet, and Cherie means darling.