Yes, but Ashkenazi Jews are stricter than Sephardi Jews.

Some Jews are ashkenazim and some are sefardim.

Sephardi Jews differ from the more common Ashkenazi Jews in that they are the descendants of Jews from the Iberian Peninsula up until the Spanish Inquisition and the Arab World in general as opposed to being from Europe. They have differing variations in culture and in practises, which mainly comes from the fact that they interpret halakhah (Jewish Law) in a different manner.

It is worth noting that Sephardi Jews are considered just as Jewish as Ashkenazi Jews, there are just fewer of them.

Yes, but there's not enough information available to them, like with Ashkenazi Jews.

Sephardi is a term used to refer to Jews who live(d) in Sepharad, the ancient name for Spain, mainly after the Roman exile. As Solomon did not live in Spain, nor was from Spain, he was not a Sephardi Jew.