My middle name in Hebrew is Kalonymos. I am named after my
great-grandfather on my father's side. We clearly did not use the
posthumous tradition in my naming. I'm sure you are aware that the
Kalonymos name dates to the 13th century at least, with the Kalonymos
family, originally from Lucca, Italy, and then Mainz, Germany. They were
payyetim - composers of beautiful liturgy. Probably the most famous was
the "Un'saneh Tokef" on Rosh Hashanna. I like to believe that our family
is somehow connected to that talented and holy group of people. After
all, it's not such a common name that someone would choose it unless it was
already in the family.
To answer your question more directly, it is possible that someone for some
arcane reason would choose to name a child Kalonymos following the death of
a father (chas v'shalom) but this would have no basis in any minhag of
which I am aware.
Robert K. Zurawin, M.D.
Department of Obstetrics and Gynecology, Baylor College of Medicine
One Baylor Plaza Houston, TX 77030
phone 713-798-6666 fax 713-798-8897