Wrong. The croatians in Hungary have origins from Dalmatia & Bosnia, they are refugees from the constant warfare with Ottomans.
My Croatian ancestor had surname which exist only is specific area of southern Dalmatia, and nowhere else in Croatia.
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Your Croatian ancestor is not directly from Daolmatia than you thin that your Croatian ancestor have a far Dalmatian origin.
Your Croatian ancestor is probably from Bunjevci people https://en.wikipedia.org/wiki/Bunjevci
Origin of Bunjevci is in Herzegovina, in the Middle Age in Herzegovina they were known as Catholic Vlachs, they migrated from Hezegovina in 16th century to Dalmatia and Lika and in 17th century they settled in Baranya, Bacska.
In southern Hungary Bunjevci live around Mohacs and Baja.
The villagers haven't mixed with anybody. When she married my Hungarian grand-grandfather, she was 100% Croatian, and spoke the croatian language.
As I said, before the 20th century, there was no mixing with Swabians, Croatians and Slovaks in Transdanubia. They mostly married their own ethnic group from village or neighbouring villages.
Now they are mixed. But it wasn't the case before.
1/2 Turkish, 1/4 Kyrgyz, 1/4 Kazakh results.
https://i.hizliresim.com/lbOOng.png