[1] His marriage to Anne Majos de Dáró produced eight children; the most notable was John II, who married to Justina Szilágyi, the widow of Vlad the Impaler and cousin of King Matthias.
[2] Through his two sons Thomas and Martin, the Erdélyi family flourished until 1643 and closely connected to the Transylvanian nobility as a consequence of several marriage alliances.
[4] In 1441, Nicholas and Stephen donated Nagydenk, Kisdenk and Mártondenk/Martinesd in Hunyad County (today all belong to Mărtinești commune in Romania) to their familiaris Mark Konya and his daughter Elizabeth for their service.
According to a charter issued on 22 March 1446 at Somkerék (today Șintereag, Romania), they shared the lands of Somkerék, Sáromberke and Gernyeszeg (today Dumbrăvioara and Gornești in Romania, respectively) among themselves, while also owned jointly the villages of Sárpatak (Șapartoc), Unoka (Onuca), Körtekapu (Poarta), Szekérberete, Rücs (Râciu), Záh and Lőrinctelke (Leorinţa), in addition to parts of Nagydenk, Kisdenk and Mártondenk/Martinesd (which were regained by then).
They handed over the latter settlements to King Matthias in return for Péterlaka (Petrilaca de Mureș) and Körtvényfája (Periș) in 1458, today parts of Gornești commune.
[10] Erdélyi was also appointed co-castellan of Görgény Castle (today Gurghiu in Romania) on behalf of his lord, who also acted as Count of the Székelys.
[11] For his service, Erdélyi was granted the collection right of tax paid by the Romanians in his estate, as well as the "sheep fiftieth" (Latin: quinquagesima ovium) by Matthias in November 1462.
Their joint troops plundered and robbed the region of Kolozs County, devastating and looting churches, causing a damage of 1500 florins for the inhabitants and the Transylvanian Chapter.
Near Görgény and Marosvécs (today Brâncovenești, Romania), the castle had a strategic role, the three forts formed a coherent defence-system at the river Maros (Mureș).
As a consequence of his high treason, his 18 villages in Inner Szolnok and Torda Counties were confiscated by the royal authority on 2 October 1468 and donated them to Stephen's nephew Ladislaus.
[20] In the name of his voivode, Erdélyi called the local Transylvanian nobles for a war against the Ottoman Empire to participate in Stephen Báthory's campaign to Wallachia, assisting the claims of Vlad the Impaler.