Complex sentence: The Raja gained lasting friendships with the other Indian princely states like Cooch Behar and Burdwan but was also popular with the Bhutanese Dorji clan, who were hereditary Prime Ministers.
Split into simpler sentences: The Raja gained lasting friendships with the other Indian princely states like Cooch Behar and Burdwan. He was also popular with the Bhutanese Dorji clan, who were hereditary Prime Ministers.