Confession: I had no idea
Columba was a masculine name. I also misread it as "Columbia" every time I see it (which is not frequently, but there is a beautiful tune called St.
Columba which is the melody of one of my favorite hymns - "Put
Peace Into Each Other's Hands" if you're curious - so I notice it in the hymnal sometimes). It seems like it would make an interesting middle name, but I wouldn't use it as a first name since even I as a name nerd who has heard the name before mistook it for a girls' name and keep thinking it's Columbia.
I'm not crazy about
Warren. There's nothing bad about it IMO - just not my taste. It is adorably old-fashioned though, for sure.