John _Bredin is right. Some (or even many) cultures do have demonyms serve as surnames. Most common are those that seem to refer to an ancestor who was an outsider to a given group – an external demonym. For example, the Italian surnames Tedesco essentially meaning “The German” and Schiavo meaning “The Slav”.
Seemingly less common as surnames are demonyms that apparently denote an insider to a group – an internal demonym. Magyar’s surname would be an example. Some others would be the English-language surnames English and (perhaps) Scott, the German surname Deutscher, and (stretching a bit) the Turkish Türkoğlu. Harkening back to when the ethno-national lines in Europe differed from today, we can also consider surnames such as Spanish Navarro and Italian Siciliano.
The FQ is simply: Are there many other surnames out there that are internal demonyms? If so, what are some examples?
Nitpick: Magyars are an ethnic group that makes up the majority (97.7%) of Hungary. Similarly: Iranians are a people who have citizenship of Iran, and Persians are something like 2/3 of the country. Bosnian is a nationality and Bosniak is an ethnoreligious group (just over 50% of the country), though this is more relying on the historic religion than any genetic differences with their neighbors. The weird example I can think of is that Somali is both a demonym but not everybody in the country is an ethnic Somali. So I’m not clear if you’re asking about nationality or ethnicity, but we can do both.
Turks didn’t have surnames as a rule until 1934, so Türkoğlu was likely in recent memory chosen to honor the country.
To help any further searches: exonym is a name designed by outsiders, endonym by the group in question. It’s less common for these to become names, but some examples I can think of are:
Suomi (Finland)
Horvat (Croatia)
Moravec (Czech, from Moravia)
Bharat or Bharath (India, usually a first name)
Moldoveanu (Moldova, but also in Romania which is the same language)
Maybe De Gaulle?
Arabic has a bunch of al- names designating where the person came from (al-Iraqi) or later adopted as an inherited name, not surnames as such.
Tons of examples of surnames derived from place names within a country (or possibly former countries), but that list is long.
Either or both of nationality and ethnicity. In the OP, I’m thinking generally of endonyms on the “nation/kingdom” (either erstwhile or present-day) level or the “population/ethnicity” level and not on the “region” or “city” level. As you note – surnames derived from mere “place names” are legion.
I don’t know the ground rules of Arabic naming conventions (esp what counts as a surname/family name), but I’ll offer these for consideration:
Masri, Masry, Misri or Al-Masri and El-Masry (Arabic: المصري, commonly spelled in the Egyptian dialect as المصرى) is Semitic language (Arabic and Hebrew) last name that literally means “the Egyptian”. The surname is commonly found in modern Egyptians …
Ultimately yes, but I think it’s more like “cousin” names. The Franks called themselves Franci, which may or may not have been related to their word for “free.” Eventually this lead to the Latin name Franciscus, and derivatives in other languages across families like: Francis/Frances, François, Franz, Franco, etc. Either related or separately, these Germanic-speaking peoples lent their name to a part of their kingdom, which was later expanded and Romanized to a different language group, creating the Kingdom of France, and later the RepublicEmpireKingdomRepublicEmpireRepubliccollaborationist rump stateRepublicRepublic
Verner Suomi was a pioneer in satellite meteorology, responsible for the first weather observation satellite and the ground processing systems and software associated with that mission.
The Wiki article for the surname “Suomi” actually lists half-a-dozen notable people.
Von can be both “of” or “from” but also in the German and Austrian(-Hungary) Empire and later was a sign of nobility. Some guys tacked on a von to be fancy. “Van” and the like don’t have the same connotations in Dutch as far as I know, it’s a toponymic feature.