Yahweh is the Father in the NT
Yahweh in the Law & Prophets calls us His Children, making Him our Father. But God is also called the Father a number of times:
Jer 31:9 They shall come with weeping, and with supplications will I lead them: I will cause them to walk by the rivers of waters in a straight way, wherein they shall not stumble: for I am a father to Israel, and Ephraim is my firstborn.
Isa 64:8 But now, O LORD, thou art our father; we are the clay, and thou our potter; and we all are the work of thy hand.
Isa 63:16 Doubtless thou art our father, though Abraham be ignorant of us, and Israel acknowledge us not: thou, O LORD, art our father, our redeemer; thy name is from everlasting.
Deu 32:6 Do ye thus requite the LORD, O foolish people and unwise? is not he thy fatherthat hath bought thee? hath he not made thee, and established thee?
1Ch 29:10 Wherefore David blessed the LORD before all the congregation: and David said, Blessed be thou, LORD God of Israel our father, for ever and ever.
Jer 3:19 But I said, How shall I put thee among the children, and give thee a pleasant land, a goodly heritage of the hosts of nations? and I said, Thou shalt call me, My father; and shalt not turn away from me.
Mal 1:6 A son honoureth his father, and a servant his master: if then I be a father, where is mine honour? and if I be a master, where is my fear? saith the LORD of hosts unto you, O priests, that despise my name. And ye say, Wherein have we despised thy name?
Mal 2:10 Have we not all one father? hath not one God created us? why do we deal treacherously every man against his brother, by profaning the covenant of our fathers?
Pro 3:12 For whom the LORD loveth he correcteth; even as a father the son in whom he delighteth.
Psa 103:13 Like as a father pitieth his children, so the LORD pitieth them that fear him.
The Jewish sage Ben Sira, 200 years before Yeshua, prayed “O Lord, Father and Master of my life… O Lord, Father and God of my life” (Ben Sira 23:1,4). Also “Lord you are my Father; do not forsake me in the days of trouble, when there is no help against the proud” (Ben Sira 51:10)
In a fragment of The Dead Sea Scrolls (written hundreds of years before Yahshua) was found the title “Our Father” (4Q511 fragment 127 line 1).