Sir Archibald Hamilton, 5th Baronet – distinguished British convert to Islam[36][37][38] Omar Hammami – American-born member of the Somali Islamist paramilitary group al-Shabaab; known as Abu Mansoor Al-Amriki[39] Hatice Refia Hanım – mother of Tevfik Fikret[40] Joel Hayward – British scholar, author and poet[41] Muhammad Robert Heft – Canadian activist and writer[42] Murad Wilfred Hofmann – NATO official, converted from Catholicism[43] Knud Holmboe – Danish journalist and explorer who converted from Catholicism[44]