Margalo could make an exotic spin on Margaret, with Margo as a nickname. The name appears in E. B. White's StuartLittle--as a bird. Margalo Gilmore (born Margaret) was a well known British-born Broadway actress.
Margalo, canary in E.B. White's "StuartLittle"
Margalo Epps, character in "Bad Girls" by Cynthia Voigt
Margalo Nordoff, character in "There's Wisdom in Women" by Joseph Kesselring
Margalit = the Hebrew word for "pearl" (Margalida is a Spanish variation)
Margolis = "pearls"