Leustach IV was born into the influential and prestigious gens (clan) Rátót, as the son of Roland II, who served as Palatine of Hungary at the turn of the 13th and 14th centuries.
Despite their father was an important confidant of Charles until his death in 1307, his sons Roland III and Leustach IV did not elevate into the group of barons.
[2] After Palatine John Drugeth left Hungary for Naples in 1333, Leustach was made ispán of Somogy and Tolna counties in that year.
[3] It is plausible that he held both offices without interrupt until his death, albeit his distant relative Oliver Paksi, also originated from the Rátót clan, was also styled as ispán of Somogy County by some contemporary documents in the summer of 1336.
[4] Following the death of his brother Roland III in the second half of 1336, Leustach was appointed ispán of Sopron and Vas counties (which two dignities were combined since 1330) too.