Abd al-Rahman al-Tahi (al-Taghi), born in 1831 in the Şirvan area of Siirt and known as “Seyda,” was a nineteenth-century Naqshbandi-Khalidi scholar and Sufi. After an early affiliation with the Qadiri order, he entered the Naqshbandi-Khalidi path through Sayyid Sibghatullah al-Arvasi. He settled in the village of Norşin (today Güroymak) in Bitlis, where he founded an influential lodge and trained many successors. He died in Norşin in 1886 and was buried there.