1: πρῶτος
(Strong's #4413 — Adjective — protos — pro'-tos )

"first," is translated "former" in Acts 1:1 , of Luke's first treatise; in Revelation 21:4 , RV, "first" (AV, "former"). See BEFORE , FIRST.

2: πρότερος
(Strong's #4387 — Adjective — proteros — prot'-er-os )

"before, former," is translated "former" in Ephesians 4:22; Hebrews 10:32; 1—Peter 1:14 . See BEFORE.