The only record of "vital statistics" which has been left us concerning Blessed Xenia is the epitaph on her gravestone:
IN THE NAME OF THE FATHER, SON AND HOLY SPIRIT. HERE RESTS THE BODY OF THE SERVANT OF GOD, XENIA GRIGORIEVNA, WIFE OF THE IMPERIAL CHORISTER, COLONEL ANDREI THEODOROVICH PETROV. WIDOWED AT THE AGE OF 26, A PILGRIM FOR 45 YEARS, SHE LIVED A TOTAL OF 71 YEARS. SHE WAS KNOWN BY THE NAME ANDREI THEODOROVICH. MAY WHOEVER KNEW ME PRAY FOR MY SOUL THAT HIS OWN MAY BE SAVED. AMEN.
Who wrote it, no one knows, but this is all we know about the early life of Blessed Xenia: only that she lived during the reigns of the Empresses Elizabeth Petrovna and Catherine II and that she was married to the imperial chorister, Col. Andrei Theodorovich Petrov. From this latter fact we may assume that she was of the lesser nobility.
Presumably, in her early years, she led an ordinary, though comfortable life, performing no services...
Read more: http://www.johnsanidopoulos.com/2011/01/life-of-saint-xenia-fool-of-st.html