There were six regiments in the 2nd Guard Cavalry Division in the Russian Empire: Horse Grenadier Guards Regiment (Leib-Gvardii Konno-Grenaderskii Polk), Her Majesty's Lancer Guards Regiment (Leib-Gvardii Ulanskii Eia Velichestva Gosudaryni Imperatritsy Aleksandry Feodorovny Polk), Dragoon Guards Regiment (Leib-Gvardii Dragunskii Polk), His Majesty's Hussar Guards Regiment (Leib-Gvardii Gusarskii Ego Velichestva Polk), His Majesty's Lancer Guards Regiment (Leib-Gvardii Ulanskii Ego Velichestva Polk), and Grodno Hussar Guards Regiment (Leib-Gvardii Grodnenskii Gusarskii Polk).
References
2nd Guards Cavalry Division (Russian Empire) Wikipedia(Text) CC BY-SA