 Sukhumbhand was born in Bangkok to Prince Sukhumabhinan and his commoner wife, Mom Dusadi Na Thalang.Prince Sukhumabhinan was himself a son of Prince Paribatra Sukhumbandhu, the Prince of Nakhon Sawan, a son of King Chulalongkorn (Rama V) with his Queen Consort Sukumalmarsri and an important minister of the royal government from 1926 until the end of absolute monarchy in 1932.Sukhumbhand was a first cousin once removed or nephew of King Bhumibol Adulyadej (because Bhumibol's father Prince Mahidol Adulyadej and his paternal grandfather, Prince Paribatra Sukhumbandhu are half-brothers, while Prince Sukhumabhinanda was an indirect first cousin of Bhumibol), in addition to being related to the current King Maha Vajiralongkorn and his sisters as a second-degree cousin.