Nicholas II Arundell, son, who married Johanna St John (died 1482), daughter of Edward St John of Somerset and heiress of her brother William St John (died 1473). From this marriage the Arundells inherited the manors of Selworthy and Luccombe, on the north coast of Somerset opposite Glamorgan where Fonmon Castle was the family's earliest seat, built by Sir Oliver St. John, one of the Twelve Knights of Glamorgan, followers of Robert FitzHamon (died 1107), the Norman conqueror of Glamorgan. The North Somerset estate of Holnicote was in the parish of Selworthy, and had been inherited on the marriage in 1745 of Sir Thomas Dyke Acland, 7th Baronet (1723–1785) to Elizabeth Dyke, heiress of Holnicote, Tetton and Pixton. The Aclands became heirs to the Arundell estates in 1802 (see below). Fragments of stained glass survive in the east window of the north aisle of Selworthy Church showing the arms of Nicholas I Arundell of Trerys, and of his wife Elizabeth Pellor ("alias" Pellower) ("sable, a chevron or between three bezants"), grandparents of Nicholas II Arundell who inherited Selworthy, who clearly inserted the glass in memory of his grandparents as he was the first to have a connection with Selworthy. These Pellor arms are also visible on the monumental brass to Sir John IV Arundell (died 1561) in Stratton Church (see image below).