Mizse (or Myze) was born into a family of Muslim (Böszörmény or Saracen) origin, which possessed landholdings in Tolna County in Transdanubia.
[3][4] Mizse and other lesser nobles, hoping the promotion of their social ascension, joined the entourage of Ladislaus IV sometime after 1285, when Hungary's central government lost power because the prelates and the barons ruled the kingdom independently of the monarch, while Ladislaus spent the last years of his life wandering from place to place.
He strongly opposed the beginning of peace negotiations that ended the brief war and proposed the capture of Austrian castles along the Danube by using warships.
[15] Eyza plundered the region of Baranya County, his men, John and Paul Véki, looted and destroyed Tomasina's estate Danóc too with its nearby monastery, both defended by Provost Andronicus of Veszprém.
[16] In response, Tomasina Morosini recruited an army; Palatine Nicholas Kőszegi, Paul Balog, Bishop of Pécs and Ladislaus Tengerdi also participated in the military campaign.
[2][8] According to local tradition, the Cuman Mizse district – whose origins can be traced back to the early 15th century – was named after the palatine, so Lajosmizse today commemorates his memory.