Lawrence II was born into the Atyina–Gagy branch of the powerful and extended gens Aba. In genealogy, the branch was named after Atyina, 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. For his loyalty and military service, Lawrence I was granted large-scale landholdings in Sopron County.
Career
He was also called as Lawrence of Nyék or Lawrence of Sopron by contemporary documents after his residence. He first appears in sources in 1279, when donated the estate of Limpach to the CistercianKlostermarienberg Abbey for his late father's spiritual salvation, who was buried in the monastery. Lawrence II was considered a faithful confidant of Ladislaus IV and his mother, Dowager QueenElizabeth the Cuman. According to a list of merits, issued by her in 1290, Lawrence usually "selflessly made his property available to the king" and negotiated in abroad at his own expense as an envoy of Ladislaus on several occasions. He was made Master of the treasury in December 1279, when Ladislaus IV imprisoned papal legatePhilip of Fermo and reorganized the royal council in order to fill the dignities with his loyal partisans. However, thereafter Ladislaus himself was also captured by some lords. In less than two months, both the legate and the king were set free. It is plausible that Lawrence held his dignity until the spring of 1280, when Ugrin Csák retook the position in accordance with the agreement and reconciliation between the king and the most powerful barons. When Ladislaus IV regained some space for maneuver, Lawrence again served as Master of the treasury from around July 1280 to April 1281, but he was ultimately replaced by his distant relative, Peter Aba from the more influential Széplak branch. , today in Austria Since the early 1280s, the powerful Kőszegi family gradually extended their influence over Sopron County, including the Locsmánd region, where the majority of Lawrence's lands had laid. According to historian Gyula Kristó, Ivan Kőszegi brought whole Sopron County under his jurisdiction and annexed it to his emerging oligarchic province by 1285, when several local nobles were mentioned as his familiares. When Nicholas Kőszegi donated a land to the Klostermarienberg Abbey in 1285, Lawrence Aba, among others, appeared as a witness and was referred to as "cari nostri", reflecting his political allegiance, as he was forced to enter the Kőszegis' service by then. The Kőszegis retook their positions over the royal council in 1284. During the course, Lawrence functioned as Master of the treasury for the third time, presumably between 1284 and 1285, until the Kőszegis' most recent rebellion against Ladislaus IV. Beside that, he also served as ispán of Sáros County in 1285. Ivan Kőszegi's continuous looting raids in Austria and Styria resulted a large-scale war throughout in 1289, when Albert I, Duke of Austria launched a massive royal campaign with his 15,000-size army against the Kőszegis and their familiares. The Austrians captured at least 30 fortresses and settlements along the western borders, including Aba Lawrence's three castles, Lánzsér, Nyék and Locsmánd, because Lawrence and his banderium refused to join the Austrian army to defeat the Kőszegi family. Duke Albert's mercenaries completely burnt and devastated the fort of Nyék, Lawrence's residence, while its inhabitants were imprisoned and sent to Austria in the spring of 1289. Nyék Castle was never re-built. For his loyalty, Queen Elizabeth, with the consent of her son, Ladislaus IV, donated the abbey of Szentmárton in Virovitica County to him in 1290. Ladislaus IV was assassinated some months later. Lawrence Aba swore loyalty to Andrew III of Hungary, and was granted lands in Križevci County from the new Hungarian monarch. These acquisitions in Slavonia became the basis of his descendants' direction of expansion, in addition that his family successfully recovered Lánzsér after Andrew's royal campaign against Austria. Lawrence Aba died sometime after 1290. From his marriage to an unidentified noble lady, Lawrence II had four sons, Nicholas I, John I, James and Peter I. During the Interregnum, they supported the claim of Charles I of Hungary. Nicholas I married one of the daughters of the once powerful baron Egyed Monoszló. Through this wedding, the brothers acquired the lordships of Darnóc and Atyina, and – following violent struggles with the Kőszegis – became ancestors of the Atyinai family, which flourished until the 1430s.
