Philippa is a feminine given name meaning "lover of horses" or "horses' friend", from the Greek Philippos, which is derived from philein, meaning to love and hippos, meaning horse. The English masculine form is Philip, which was formerly the vernacular form for both sexes. The Latinate Philippa was used in official church records for women bearing the name in medieval times, but they were actually called Philip or the French Philippe. The name Philippa came into common use for women in the Anglosphere in the 1800s. Common alternative spellings include Filippa and Phillipa.
https://en.wikipedia.org/wiki/Philippa