Hi Teodor,
I came across this inscription a few times, for the examples you can look at these threads:
http://www.vikingsword.com/vb/showth...ight=g%F6n%FCl
http://www.vikingsword.com/vb/showth...ight=g%F6n%FCl
Interesting idea about how to interpret the inscription, I never thought it in that way. How did the owners choose a certain inscription over others, or did they really choose which inscriptions to put on their yatağans, I really don't know. Also the title Ağa (or Agha) is a tricky one, this title was used by all the military classes. The owner could be a janissary as Dom pointed out, he could be also a member of artillery corps, naval soldier, a member of ruling elite etc etc. no way of telling with this little piece of information.