Avi-Ad (אֲבִי־עַד) — "Everlasting Father" — is the messianic title in Isaiah 9:6: "For unto us a child is born... and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace." The title does not confuse the Son with the first Person of the Trinity. Rather, it declares that the incarnate Son is the eternal Father of His people — the everlasting Head, Origin, and Provider of the redeemed family. He fathers His people across all generations without end. The same Lord who in Isaiah 53:10 "shall see his seed" is here the Avi-Ad. Every Christian who calls God "Abba" is fathered through this Son.
Webster 1828: the eternal Father whose care over His people knows no end.
The title does not confuse Persons of the Trinity but ascribes to the Messiah the fatherly nature of unending care, provision, and authority over the redeemed.
Isaiah 9:6 — "And his name shall be called...The everlasting Father, The Prince of Peace."
Psalm 103:13 — "Like as a father pitieth his children, so the LORD pitieth them that fear him."
Isaiah 63:16 — "Doubtless thou art our father...thy name is from everlasting."
Malachi 2:10 — "Have we not all one father? hath not one God created us?"
Our age has fatherless homes and a fatherless theology; Avi-Ad answers both.
The collapse of fatherhood in the home mirrors a collapse of Father-language in the church. Many now refuse to name God Father at all.
Avi-Ad stands. He is the Everlasting Father whose care does not fail, does not abandon, does not age out.
Av (father) joined to Ad (perpetuity, eternity).
H1 — Av — father
H5703 — Ad — perpetuity, eternity, forever
"Avi-Ad fathers across all generations."
"The Everlasting Father never ages and never abandons."
"Call Him Avi-Ad and remember you are not orphaned."