First name - Calihan / Callahan

I read Calihan as Caliban to start with.

Could be a sibling for Mae, Heath, Cameryn and Blaire

I only know it from the Bucket List Family too. Iirr they did a video about why they chose the name at some point.

I think it's an English form of an Irish name.

I can only think of Dirty Harry.

I do quite like it though but only as an adult. I can't imagine a small child being called it and would have to nickname them Dirty Harry.

The normal spelling is Callaghan (as in James Callaghan, former PM).

Hence my spellings of May, Cameron and Blair

I also read it as Caliban. Personally I would avoid it, as there are a whole load of non-problematic names to choose from.

I know a little Callan if that’s easier?

If it's a serious suggestion, make sure you don't have a surname that can also be a first name.
Calihan James is likely to be called James, and it assumed the names have been transcribed incorrectly.

It's an Irish surname , so not a first name at all