Is it farther or further?
early 14c., from Old French progenie (13c.) and directly from Latin progenies "descendants, offspring, lineage, race, family," from stem of progignere "beget," from pro- "forth" (see pro-) + gignere "to produce, beget" (see genus).
progeny prog·e·ny (prŏj'ə-nē)n. pl. progeny or prog·e·nies
One born of, begotten by, or derived from another; an offspring or a descendant.
Offspring or descendants considered as a group.