Frederica \f-rederi-ca, fr(e)-de-rica\ as a girl's name is pronounced fred-er-EE-kah. It is of Old German origin, and the meaning of Frederica is "peaceful ruler". Feminine form of Frederick. Fredrikke is the name of a queen of Norway. Opera singer Frederica von Stade.

Frederica has 28 variant forms: Farica, Federica, Fred, Fredalena, Freddee, Freddey, Freddi, Freddie, Freddy, Fredericka, Frederickina, Frederika, Frederine, Frederique, Fredi, Fredia, Fredie, Fredricia, Fredrika, Fredrikke, Frerika, Friederike, Rica, Ricki, Rickie, Ricky, Rikki and Rikky.

For more information, see also related names Freda, Fritzi and Richelle.