Can’t decide on a baby boy name

My grandpas name is John and I promised my grandparents if I had a little boy (because they didn’t have one and were going to name their son Joshua John if they had a boy) I would honor my grandpa by using his name. My fiancé’s grandpa is getting very sick and possibly will be passing away soon and he also wanted to honor his grandpa and incorporate James into the babies name. My issue is that I can’t decide on which I like better. I figure out the sec of baby on Dec 17th and we have a girl name already picked out lol. Help me out ladies.