[ἀπάτωρ] from G1 (as a negative particle) and G3962; fatherless, i.e. of unrecorded paternity
Usages throughout the bible
Hebrews 7:3
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Without father, G540 without mother, without descent, having neither beginning of days, nor end of life; but made like unto the Son of God; abideth a priest continually.