The poem of praise forms an acrostic spelling the name Mordechai, and this is confirmed by the last line that is partially visible.
Unfortunately, the continuation of the line, where his father's name would be, is hidden behind the mound of soil at the bottom left. Another photo might be helpful, but it would be best if the photographer were to reveal the remainder of the engraving.
Another person mentioned the name Shraga. I see this name, too, but it seems to be referencing the brother of the deceased.
Brooklyn, New York, USA