pochowany

Pochowany is the past participle of pochować, which in this sense means to lay someone in a grave. You meet it in parish burial books and in notes beside a death entry.

Other burial words in the same records are pochowanie and pogrzeb, both meaning burial, and pogrzebany, buried. The cemetery is cmentarz. A burial date and a death date are two different facts, so note which one the entry gives before you copy it into your tree.