I find it difficult to find primary or even secondary sources confirming Marton's genealogy.
Wissgrill (*) gives a very different version, which is corroborated by Ivan Nagy (**)
(*) https://books.google.fr/books?id=o852EVOvIZgC&pg=PA432 (**) https://www.arcanum.hu/hu/online-kiadvanyok/Nagyivan-nagy-ivan-magy...
Could anybody fill in other for reliable sources ?