The name Sigourney means The Conqueror and is of French origin. Sigourney is name that's been used by parents who are considering unisex or non-gendered baby names--baby names that can be used for any gender.
From a French surname spelled Sigourney or Sigournay. The American
actress Sigourney Weaver (originally Susan) took the stage name Sigourney from a character in The Great Gatsby by F. Scott Fitzgerald.