I get it. I generally name mine to cover both.
So if the mausoleum stone is for Bob and Sally Stone, I don't make the title just "Bob Stone", but I call it "Mausoleum Stone of Bob and Sally Stone"
I think you could do the same for these records. "Baptismal records for Billy Stone, Parents Bob and Sally Stone" - it might be too long, but I'd give it a try.