On 24 June 1914 two weeks after the death of his cousin Grand Duke Adolf Friedrich V, Charles Michael wrote to the new Grand Duke Adolf Friedrich VI informing him that he wished to renounce his rights to the throne of Mecklenburg-Strelitz. On 7 August shortly after the outbreak of World War I he became a naturalised Russian citizen.
Frederick Francis III, Grand Duke of Mecklenburg-Schwerin (19 March 1851 – 10 April 1897) he married Grand Duchess Anastasia Mikhailovna of Russia on 24 January 1879. They had three children. Duke Paul Frederick of Mecklenburg-Schwerin (19 September 1852 – 17 May 1923) he married Princess Marie of Windisch-Graetz . on 5 May 1881.
Christian Louis II, Duke of Mechlenburg-Schwerin (father of 158) 317. Duchess Gustave Caroline of Mecklenburg-Strelitz (mother of 158) 318. Francis Josias, Duke of Saxe-Coburg-Saalfeld (father of 159) 319. Princess Anna Sophie of Schwarzburg-Rudolstadt (mother of 159) 320. Frederick Charles, Duke of Württemberg-Winnental (father of 160) 321.