engineer

The Oxford Dictionary of English Etymology gives the etymology of engineer as follows:
 
engineer -- a designer or constructor of engines or work, originally of military engines.
 
From Old French: engineour
 
From medieval Latin: inginiatorem
 
From Latin: ingenium  -- innate or natural quality, inborn ability.  Of persons: a genius, i.e., a man of genius, a clever, ingenious person.  Of things: an invention, a clever thought ( so, we get our word engine ).
 
From Latin: in + gigno:
 
From Latin: gigno, genui, genitum -- to beget, bear, bring forth.
______________________________________________________________________
 
From the American Heritage  Dictionary of the English Language:
 
The Latin gigno is ultimately from the Indo-European root gen- :  To give birth, beget, with derivatives referring to aspects of and results of procreation, and to familial and tribal groups.
______________________________________________________________________
 
The Greek word gignomai ( gignomai, to come into being, be born ) is also from the same Indo-European root gen-