Sultan Sir Alaeddin Sulaiman Shah Ibni Al-Marhum Raja Musa GCMG KCVO (11 September 1863 – 31 March 1938) was the fifth Sultan of Selangor from 1898 until 1938. He was previously known as Raja Sulaiman before being crowned Sultan. Sultan Sulaiman was appointed a Knight Commander of the Order of St Michael and St George (KCMG) in 1912 and later the Knight Grand Cross of the Order of St Michael and St George (GCMG) in 1929 by the United Kingdom with the title Sir.