I need a name of a Jewish troubador from the middle ages-18th century?

Answer 1

Mmm...

Here are some of the Jewish medieval troubadours I can think of at the moment:
*Solomon ibn Gabirol/ R' Shlomoh Ibn Gbirol /HaRashbag
*Yehuda Halevi
*Yehuda Alharizi
*Moses ibn Ezra/ Mosheh Ibn Ezra

Answer 2

Your question isn't very clear. The 18th century isn't considered part of the Middle Ages. Here is something from Wikipedia that may be what you are looking for.

Berl Broder (1815–1868), born Berl Margulis was a Ukrainian Jew, the most famous of the Broder singers, 19th century Jewish singers comparable to the troubadours or Minnesänger, and reputed the first to be both a singer and an actor. Thirty of his songs survive; of these, 24 are in the form of dialogues, usually between craftsmen such as tailors or shoemakers; his songs are seen as a precursor to Yiddish theater.

He childhood was taken up with religious studies at home, until his father's death when he was 16. A handsome, bright young man with a good voice, he taught himself the violin. He worked briefly as a brushmaker; his co-workers became his first audience, and he developed a reputation for always having a rhyme or a proverb.

From some time in his late teens or early twenties, he headed on the road as an itinerant performer, along with two other singers, one of whom was also a tailor who made costumes for the troupe. It is believed that many of his songs were improvised on the spot; only thirty survive in written form.

After leaving Brody, he never settled in any one place; he was also known as a heavy drinker. He died in Ploieşti, Romania.

After more searching, I believe ellentari's response is the name you were looking for.

Answer 3

Isaac b. Abraham HaGorni