Stuck on boys names

Hey! I'm due my third boy at the end if May and I'm stuck with names. I thought I had decided on Jonah, but the more I think about it I don't know if I'm fully 100% - although I do like it. I want the name to be able to link with my Nan, Joan. She has always been very special to me, and recently she has gone down hill and is in a care home, we don't know how long she has left so I want that connection, but with a boy its hard. If it was a girl Joan would have been her middle name.. Any help please 🙏🏻