Big fan of Frodo actually having emotions regarding his dead parents
I imagine that when Sam and Frodo end up having kids together, Sam is so excited and the two of them are working together to pick out the prefect names. On they're like 3rd kid they're having a baby boy (probably Frodo's via surrogate) and they've thought long and hard and know EXACTLY what to call him- until...
Frodo seems him and he looks like Drogo.
He's getting all teary eyed and trying to hide it. Then as neutrally as he can because he doesn't wanna ruin their plans, he asks to change the name. His voice totally gives away how much it would mean to him tho and they go home with baby Drogo
Later Sam's thinking about how he wanted to have a girl named Primrose but how it's a little awkward to have a kid named Rose and after moving on from and/or dumping Rosie. So he ends up asking to name their next daughter Primula