legally, there is

the definition of a “free white person”? Let’s look in Black’s Law 4th Edition to figure that out:

meaning all persons belonging to the European races then commonly counted as white, and their descendants, including such descendants in other countries to which they have emigrated.

It includes all European Jews, more or less intermixed with peoples of Celtic, Scandinavian, Teutonic, Iberian, Latin, Greek, and Slavic descent. It includes Magyars, Lapps, and Finns, and the Basques and Albanians. It includes the mixed Latin, Celtic-Iberian, and Moorish inhabitants of Spain and Portugal, the mixed Greek, Latin, Phoenician, and North African inhabitants of Sicily, and the mixed Slav and Tarter inhabitants of South Russia. It does not mean Caucasian race, Aryan race, or Indo-European races, nor the mixed Indo-European, Dravidian, Semitic and Mongolian peoples who inhabit Persia. A Syrian of Asiatic birth and descent will not be entitled to become a naturalized citizen of the United States as being a free white person. Ex parte Shahid, D.C.S.C., 205 F. 812, 813; United States v. Cartozian, D.C.Or., 6 F.2d 919, 921; Ex parte Dow, D.C.S.C., 211 F. 486, 487; In re En Sk Song, D.C.Cal., 271 F. 23. Nor a native-born Filipino. U. S. v. Javier, 22 F.2d 879, 880, 57 App.D.C. 303. Nor a native of India who belonged to Hindu race. Kharaitf Ram Samras v. United States, C.C.A.Cal., 125 F.2d 879, 881.

https://www.williamsandwilliamslawfirm.com/a-treatise-on-the-word-person