What relation to Peter the Great of Russia was Catherine I of Russia?
Catherine I of Russia Catherine I of Russia Catherine I (, born , later known as Marta Samuilovna Skavronskaya; – ) was the second wife of Peter the Great and Empress of Russia from 1725 until her death. The life of Catherine I was said by Voltaire to be nearly as extraordinary as that of Peter the Great himself. There are no documents that confirm her origins. Said to have been born on 15 April 1684 (o.s. 5 April), she was originally named Marta Helena Skowrońska. Marta was the daughter of Samuel Skowroński (later spelt "Samuil Skavronsky"), a Roman Catholic peasant from the Polish–Lithuanian
Tsarevna Catherine Ivanovna of Russia Tsarevna Catherine Ivanovna of Russia Tsarevna Catherine Ivanovna of Russia (20 October 1691 – 14 June 1733) was a daughter of Tsar Ivan V and Praskovia Saltykova, eldest sister of Empress Anna of Russia and niece of Peter the Great. By her marriage, she was a Duchess of Mecklenburg-Schwerin. Catherine was born in Moscow and baptized at Chudov Monastery; her godparents were her uncle Tsar Peter I and her great-aunt Princess Tatiana (daughter of Tsar Michael I. She was the third of five daughters, but the early deaths of her older sisters Maria (on 23 February 1692, aged three) and