Born in Moscow, Russia (Soviet Union) as Masha Rostova, Elizabeth Keen, at the age of 4, was involved in a traumatic incident in which she shot and killed her father, the real Raymond Reddington, to stop him from attacking her mother, Katarina Rostova, then she moved to Nebraska and was raised by Sam Milhoan.

https://the-blacklist.fandom.com/wiki/Elizabeth_Keen_(Character)#Appearance

.@Hans_Kloss thank u very, very much for answer my life question.