 Lawrence II was born into the Atyina–Gagy (or also Nyék) branch of the powerful and extended "gens" (clan) Aba.In genealogy, the branch was named after Atyina (present-day Voćin, Croatia), the acquisition and eponymous estate of Lawrence's sons.He was the only known son of his namesake father, who was a faithful partisan of Béla IV of Hungary.