Strong's G3995 · Greek

πενθερός

pentheros · pen-ther-os'

of uncertain affinity; a wife's father

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 1 πενθερός , -οῦ, ὁ , [in LXX chiefly for חָם , Ge 38:13 , al.; also for חֹתֵן , Jg 1:16 A;] a father-in-law : Jo 18:13 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain