Salome holds the plate, and since her elaborate dress still leaves her implausibly high breasts completely uncovered, she is unlikely to be a portrait of an important figure. To the right of Herod, the group of ladies includes: Elizabeth Stuart, Queen of Bohemia, Queen Maria Eleonora of Brandenburg, widow of Gustavus Adolphus of Sweden (died 1632), with her daughter Christina, Queen of Sweden (only born in 1626) and sister Catherine of Brandenburg, briefly ruler of Transylvania after her husband Gabriel Bethlen, King of Hungary, died in 1629.
Christina, Queen of Sweden
Catherine of Brandenburg