I checked again in the lexicons I have at home, the intermediate Liddell &
Scott, Thayer, & Cassell's Latin (relates unigenia to the Greek MONOGENHS).
I also checked the LSJ at Perseus which gives the following,
mono-gen=EAs, es, Ep. and Ion. mouno-, (_genos_) the only member of a kin or
generally, only, single, pais Hes. WD 376, Hdt. 7.221, cf. Ev.Jo.1.14,
Ant.Lib.32.1; of Hecate,
Hes. Th. 426.
Considering its use across the Greek world, it seems to me the proper use
in the Greek NT is also "unique."
See also my previous post on Heb. 11. For the theological implications, I
thought Carl Conrad's post was very good, especially in the historical
development once the Christian gospel moved out into the Greek/Roman world.
Carlton L. Winbery
=46ogleman Professor of Religion
=46ax (318) 442-4996
Phone (318) 487-7241