You know when someone asks, is it OK if I pray for a future spouse etc, etc? My thought is sure, why not. I mean I don't see how it could hurt, but then there are those that say, you should pray for this, or that. I remember going to catechism classes when I was young and I asked the teacher if I could pray a certain way. She said, no, you should only pray this way. My Dad was Catholic and my Mom was Protestant, neither one was involved in church or anything, but I asked my Mom, my Mom said, you can pray any way you want.
I'm not saying that all Catholics would tell you how to pray, because I know many Catholic people who agree with my Mother However that always stuck in my head. Your dialogue with God is between you and God. You can pray for whomever you want to pray for, wherever you want to pray for them, at least in America you can. If I want to pray for the sheets on my bed then that's up to me. It's between you and God, that's what I tell my kids. You can tell God anything. He's your Father, he knows your heart.
So those of you who want to know who to pray for, pray for whomever you chose. That's up to you and between you and your Father.