not lineal

Unlineal, un-lin′ē-al, adj. not lineal.

Indirect, in-di-rekt′, adj. not direct or straight: not lineal or in direct succession: not related in the natural way, oblique: not straightforward or honest.—adv.

In many cases, too, the denizens of the ancient houses were not lineal descendants of the original founders; they were interlopers, by purchase or otherwise.