Meanings of own genealogy in English

They could not trace their own genealogy back for two hundred years.

What can we deduce from this with regard to our own genealogy?

This is a reminder that she has her own genealogy as well as her own literary fecundity.

He found me in the pages of his own genealogy, brought me back to become a nameless, faceless assassin.

De Landa introduces us to a future robot historian, a second narrator of sorts that is charting its own genealogy.

With several colleagues, he's creating a public school curriculum that lets students study the science behind their own DNA and reconstruct their own genealogy.