Question: Who is Haydar Mirza Safavi's paternal grandfather?
Sentence (from "Tahmasp I"): Upon adulthood, however, Tahmasp was able to reassert the power of the Shah and control the tribesmen with the start of the introduction of large amounts of Caucasian elements, effectively and purposefully creating a new layer in Iranian society, solely composed of ethnic Caucasians.
Relevant evidence: No