For your purchase agreement to be binding, it must contain certain terms. Initially, it must have the same terms as a legally binding contract, defining the purpose and the parties involved. It must include an offer, acceptance and consideration for the purchase.
The hexagram is Satan's symbol for Israel, while the menorah is God's symbol. Listen to Dr. O.J. Graham, above, as he begins our discussion. The quest began at York University, Ontario, Canada, when an Orthodox Jewish friend of mine was investigating Messianic Judaism ...  '... the Star of David is not Jewish.
The answer is clear: No, a Star of David in an old family crest does not proof Jewish origins. Before the Nazi Era and the founding of the State of Israel in 1948, Christian sensitivities towards this symbol were different than today. Many villages and towns displayed a star like the Star of David in their crests.