Seyyedan (, also Romanized as SeyyedÃÂn; also known as Seydà «, Seydà «n, SëdÃÂn, and Sëdu) is a village in Qaleh Zari Rural District, Jolgeh-e Mazhan District, Khusf County, South Khorasan Province, Iran. At the 2006 census, its population was 133, in 37 families.