Conde in 1820 indicated that Umar ibn Hafsun was "a man of pagan origin, of obscure and unknown ancestry."

She was adopted by Les and Sandra Sinclair, but because of her unknown ancestry chose to call herself Izzy S (for "Izzy Somebody") instead.

The recently evolving field of genetic genealogy and DNA sequencing has permitted people of unknown ancestry to make use of DNA testing to establish some evidence for their ancestral origins.

They had only two things in common: each was a mongrel of unknown and indistinct ancestry, and each was free to a good home.

And again, he wondered at her unknown ancestry - a renegade House, perhaps?

Throughout most of its history the bloodhound was seen as a dog of English or Anglo-Scottish origin, either of unknown ancestry, or, more recently, as developed in part from the St Hubert.

Glabas married Maria Doukaina Komnene Branaina Palaiologina, of unknown ancestry.

Of unknown ancestry, the duration of his reign is equally uncertain.

The term is also used at times to refer to a domestic animal of unknown ancestry where the breed status of only one parent or grandparent is known, though the term "mixed breeding" is technically more accurate.

In some cases, even unknown or undocumented ancestry may be permitted.