Popular jews

That 'jew's ear' fungus (Auricalareae) of a recent post started me on thinking of the other jews/jewishness embedded in common names, such as the jew's harp or wandering jew plant (Tradescentia spp) we called wandering sailor.

Here's some more:
Jewbush
Jew's mallow
Jew's frankincense
Jewfish
Jew's-stone
Jew's myrtle
Jew's pitch
jew plum
jew thorn
jew's apple
Jews' money, Jew's castles- (ancient coins or ruins)

However, jewel and jewellery are not deemed cognate with jewishness, despite long traditions of artistry and trade in jewellery with the community. Etymological sources associate jewel (first mention 13th C), jewellery and jeweller with roots in French 'joue' (plaything, ornament) and Latin 'jocus' (joke). There's so little mention of the overlap between sound and trade in jeweller and Jew that I'm wondering if this is considered anti-semitic in some way that escapes me. My sketchy knowledge associates Jewish with jewellers in Salonika and in the Netherlands. And, come to think of it, lots of Jewish jewellers in the Josefov (jewish quarter) in Prague, where a community is said to date back to the 10thC CE.

There was an exception from a Greek travel website, of all places, which linked Jewishness and jewellery

The Jews learned professions that they could easily practice within any country, especially medical professions. Instead of buying land, they invested all their money in gold, jewels, and valuables of every kind so that at any given moment, they could pack their valuables and depart with a bag in hand. Incidentally, a large amount of diamonds, rubies, pearls and gold was handed over to the Germans by the Jews in Thessaloniki. Many Jews became bankers, lending money with high interest, auctioneers, and jewelers which might explain the word, "Jew". "Jew" might mean someone who deals with precious stones. Finally, in Chinese, the word, "zhu" means jewel.