Herbord Osl

[4] He was first chronologically mentioned by contemporary documents in 1230, when participated in the military campaign of the duke, who crossed the Carpathian Mountains and laid siege to Halych together with his Cuman allies.

[5] During the First Mongol invasion of Hungary, when Béla escaped after the disastrous Battle of Mohi, took place on 11 April 1241, and fled to the coast of the Adriatic Sea, Herbord left behind his estates and relatives and joined to the royal companion to Croatia and Dalmatia by the end of June.

For instance, when the monarch judged in the lawsuit between Amadeus Pok, Bishop of Győr and the burghers of Sopron over the property right of port duties in Lake Fertő (Neusiedl) in 1254, Herbord and a delegate of the Pannonhalma Abbey drafted the borders in the region.

Alongside the abbot of the Klostermarienberg Abbey (Borsmonostor), he inaugurated the ispánate (lordship) of Locsmánd (present-day Lutzmannsburg in Austria) to the ownership of Lawrence Aba, Master of the stewards in 1263.

[6] He remained loyal to Béla IV, whose relationship with his oldest son and heir, Stephen, became tense in the early 1260s, which caused a civil war lasting until 1266.

In the next year, he filed a lawsuit alongside his brothers against their relative Nicholas, son of Szatmár, who donated some of his landholdings in Sopron County to the Knights Templar.

[8] He gained the estate Bezeg from Nicholas Ákos via a lawsuit; the land laid in the neighbor of Csáva (present-day Stoob, Austria), which then was the centre of Herbord's domains.

He was granted the land Rasina in Slavonia by Béla IV in 1248; this is the only known royal donation for Herbord, who founded a nearby village, which was subsequently called Herbortya after him.

Despite his efforts, his aspirations to increase the number of possessions remained marginal and confined, as compared to his powerful neighbor lords, the Kőszegi family and the Csák clan.

[9] When Stephen V ascended the Hungarian throne after his father's death in 1270, the newly crowned monarch permitted Herbord to build a fortress at Lake Fertő in order to strengthen the Western border against Ottokar II of Bohemia.

[9] Following the sudden death of Stephen V and the coronation of the child ruler Ladislaus IV in 1272, Herbord was made ispán of Tolna County, according to two royal charters in November.

[11] While holding the latter office, he and his namesake son had various lawsuits and hostilities with local baron Conrad Győr, who owned extended lands in the county (some historians claim those documents referred to Herbord from the gens Hahót).