Something I think I’ve seen in movies (mostly ones implied to be ancient japan) is a family grave. A single pillar driven into the ground with the family name and then everyone is cremated or something. Notable individuals for the family get a pillar next to it, but this could be a solution as first world countries reach the point where space is a premium. This allows families to mourn recently, and not-so-recently deceased.
Cyberpunk has the Columbariums - huge columns of thousands of cremated individuals, with a digital display for your Epitaph and name