"ger"

i am a lay, very lay, person who has been a member of this group for
a couple of years, reading only, never posting. but, now, i'm
wondering if anyone would be willing to respond to a question i have
about the word "ger", which i have heard is the hebrew
for 'stranger'. does the word 'stranGER' contain the 'ger' as a
result of its general use from the hebrew, or is there a source
common to both hebrew and german for this syllable (would you call it
a 'root'?). for that matter, what about the 'ger' in 'GERman'?
~fran