Complex sentence: Shams-ud-Din Shah Mir (reigned 1339--42) was the first Muslim ruler of Kashmir Concise Encyclopeida Of World History By Carlos Ramirez-Faria, page 412 and founder of the Shah Mir Dynasty.
Split into simpler sentences: Shams-ud-Din Shah Mir (reigned 1339--42) was a ruler of Kashmir and the founder of the Shah Miri dynasty named after him. He was the first Muslim ruler of Kashmir Concise Encyclopeida Of World History By Carlos Ramirez-Faria, page 412 and founder of the Shah Mir Dynasty.