[3:67] No; Abraham in truth was not a Jew, neither a Christian, but he was a Muslim and a ḥanīf...
The ḥanīf is the one who stands straight (mustaqīm) on the right way. The aḥnaf is one who is mustaqīm with bow legs - the one who leans with his feet in this way is called mustaqīm for good luck. Abraham (ʿa) was a ḥanīf, not bending from the truth and not swerving from the law, and not zigzagging according to anything in which there is a share belonging to the soul. He surrendered his wealth, his soul, his son, and everything altogether to the ruling (ḥukm) of God and to waiting for His command.