Under Marumakkathayam, the succession passes to the male offspring of its female members, in other words from a man to his sister's son and so forth. As the only Muslim rulers in Malabar, they saw the rise of Hyder Ali as the opportunity to increase their own power at the expense of Chirakkal, and invited him to invade Malabar. Ali Raja Kunhi Amsa II and his successor, Arakkal Bibi Junumabe II, were among Hyder Ali and Tippu Sultan's staunchest allies during the Mysore invasion of malabar.[citation needed]