1: πρόγονος
(Strong's #4269 — Adjective — progonos — prog'-on-os )

an adjective, primarily denoting "born before" (pro, "before," and ginomai, "to become"), is used as a noun in the plural, 2—Timothy 1:3 , "forefathers" (in 1—Timothy 5:4 , "parents"). See PARENTS.

2: πρό
(Strong's #4253 | 3962 — Preposition — propator — pro )

"a forefather" (pro, "before," pater, "a father"), is used of Abraham in Romans 4:1 .