On Tombstones
Some common themes appear on many Jewish tombstones. Two hands with outspread fingers indicated that the dead man was descended from priestly stock (Kohanim) who blessed the people in this fashion, and a jug was carved on the tombstones of the Levites as an emblem of the those who washed the priest's hands before he pronounced the blessing.
Some gravestones show a tree with branches either outspread or broken off, symbolizing the death of a young man or an old man respectively; or they have a cluster of grapes as an emblem of Israel.
The Star of David (Magen David) occurs frequently.
Sometimes figures symbolized the name of the deceased, as the figure of a lion for Loeb, a wolf for Benjamin, and a rose for the name Bluma/Blume.
Read more about this topic: Jewish Symbolism