Speaking of Tribalism...

Scottish Jews have their own tartan as of now. This has apparently been in the works for centuries.

The tartan, featuring distinctive tones of navy and burgundy, is a kosher non wool-linen mix which abides by shatnez - the Jewish law prohibiting the mixture of wool and linen in garments.

Religious experts and tartan authorities worked together to come up with a design that represent both Jewish values and Scottish history.... The tartan design features blue and white, the colours of both the Israeli and Scottish flags, with the central gold line representing the gold from the Ark in the Biblical Tabernacle.

The silver is to represent the silver that adorns the Scroll of the Law, while the red depicts the traditional Kiddush wine.

There are seven lines in the central motif and three in the flag representations - both numbers of great significance in Judaism.

So now you know.

In addition to family/tribal lines, Scotland has a number of universal tartans that Jews could have always worn (although I don't know if they abide by kosher laws about mixing wool and linen). There are also tartans for districts, including a number of American states. Georgia's is particularly meaningful given the early history of Scottish Highlanders in making the colony of Georgia a reality in the face of Spanish aggression.