Yes. Many graves are designed to allow two or more burials, subject to cemetery regulations and available space.
Double-Depth Graves
Allow one burial above another.
Family Graves
Designed for multiple family members over time.
Ashes Interments
Cremated remains can often be added to existing graves.
Shared graves can:
Before arranging a second burial, check:
Often yes.
Usually.
Yes, from the burial rights holder.
Generally yes.