real-brisker
You’re right and wrong.
You’re right that a person shouldn’t name a child after 2 grandfathers, as neither grandfather has his name anymore.
but the gedolim say if you’re stuck with a name like shprintsa, instead of not giving it at all, name here Bracha Shprintsa, and call her Bracha so everyone is happy.
PS same applies if grandfather was a rasha, but family expects the name, give that name but have a tzaddik in mind.