Notable members of the family were bans of Croatia and Slavonia, king's chamberlains, bishops, ispáns, župans (counts) and other state officials.

John I Ernuszt, nicknamed „Hampó", became king's regular banker and increased his wealth by lucrative and profitable business with the sovereign.

On 20 November 1473 he was appointed Ban of Slavonia, receiving at the same time Međimurje County, the northernmost part of the territory, with its seat Čakovec.

He himself helped people by setting ferries on the Drava and Mura river which enabled the refugees to cross them and go further north to reach western Hungary, which was still not occupied.

Plemićka obitelj Ernuszt (Ernušt) bila je židovskog podrijetla, a došli su u Ugarsku iz Švedske ili Austrije.