Complex sentence: A significant part of his inherited lands were located in Máramaros County and his father persuaded Michael I Apafi, Prince of Transylvania, to make Imre the "ispán" (or head) of the county in 1667.
Split into simpler sentences: A significant part of Imre's inherited lands were located in Máramaros County. At István Thököly's request, Michael I Apafi, Prince of Transylvania, made Imre the "ispán" (or head) of the county in 1667.