Blanche I, queen of Navarre and Sicily (born 1387)

Blanche I was Queen of Navarre from the death of her father, King Charles III, in 1425 until her own death. She had been Queen of Sicily from 1402 to 1409 by marriage to King Martin I, serving as regent of Sicily from 1404 to 1405 and from 1408 to 1415.