The Paleologo-Oriundi are an Italian family which dubiously[1] claims descent from Flaminio Paleologo, an illegitimate son of John George Palaeologus, Marquis of Montferrat 1530–1533.

They also claim that the last name Calabraga, supposedly originally assumed by a member of the family who was fleeing the law, saw periodical usage in the 16th century.

The name Oriundi was allegedly first assumed in the late 17th century, "oriundo" meaning an immigrant that is originally of Italian ancestry, a word linguistically related to the term orient (east).

Though they were sometimes given Greek names, such as Theodore and Sophia,[12] most of the Palaiologan Marquises of Montferrat paid little attention to affairs in the eastern Mediterranean.

[15] The new marquis, Federico II Gonzaga, was connected to the family by marriage, being the husband of Margaret Paleologa, niece of John George.

Although Flaminio would end his life accused of conspiracy against the Gonzagas, being violently killed in prison on 24 May 1571, he would supposedly be survived by seven children.

If they were to be genuine male-line descendants, they would still not be considered true members of the Palaeologus-Montferrat family, or the Palaiologos dynasty itself, on account of descent through an illegitimate son.

[4] According to the Paleologo-Oriundi family, Flaminio's eldest son, Teodoro (?–1586), was also accused of conspiracy and took refuge in his wife's homeland, Camerano, near Ancona.

[22] The current head of the family is Arnaldo's son Carlo Paleologo-Oriundi (born 1924), a Venetian banker who lives in Mestre.

[1] There existed a cadet branch of the Paleologo-Oriundi family native to Rome, the Quintini-Paleologo, descended matrilineally from Giuseppe (1792–1861), uncle of Federico.