Question: What was a branch of the Khalwatiyya order of Islamic mysticism founded by Sayyid Hasan Husameddin, with relations to the cousin and son-in-law of Muhammad?
Sentence (from "Ussaki"): Ushshaki (Turkish: "Uşşaki "Ush-shaki"" ), is a branch of the Khalwatiyya order of Islamic mysticism, also known as "Tasawwuf", founded by Sayyid Hasan Husameddin.
Relevant evidence: Yes