Didrik Schiele wrote:

>...  In a biography, professor Sterling E.  Moll of Chester University
>(USA) points out that the earliest mention of his name the scripts tell
>is his wedding matricle, where it is mentioned that he was born in 1750 and
>is now named Frantiszek Antonin Rossler.  At that time he might already had
>czechified his name from the original italian Antonin Rosetti.  Different
>things speak for and against this and the traditional version.  Among them
>counts that there were already at least five well known musicians named
>Rosetti in Europe at that time, and that he showed an affinity to moderate
>his name to the environment, as when he got an employment in Wallerstein in
>Germany, he germanified his name to Franz Anton Roessler.

Not quite.

Rosetti/Rossler never "czechified" his last name.  "Rossler" is not a
Czech name.  (Nor is "Antonin" Italian.) "Rosetti" wasn't his original
name:  he started using this Italian form before 1773, even though there
were other Rosettis in Europe.  At the Oettingen-Wallerstein court, and
later at Ludwigslust, where he spent the rest of his life, he used the
Italian name Antonio Rosetti.  Considering the fashion for Italian music,
it would not make sense for any musician to change his name to a German
one.  Quite to the contrary, Italian musicians were better appreciated.
There was no question of "moderat[ing] his name to the environment" at
the Oe-W court or at Ludwigslust.  He didn't have to germanify his name,
because it was the German version that was almost certainly his own.  -
Franz Anton Rossler, most likely.

-Margaret