Often there are Slavic word connections between countries.
And perhaps you have a Serb-Croatian connection ?

In Croatian Srp means sickle.
And Srpski means Serbian.

In Czech/Slovak, word Srb means Serb or Serbian.
Srpen means August in Czech.
Srp also means sickle in Czech.
(Sierp in Polish)

Perhaps an old historical Slavic association with the
Cyril and Methodius mission from Croatia to Moravia
in c 868 ?