Question: Who is the paternal grandmother of Infanta Beatriz Of Spain?
Sentence (from "Beatriz, Duchess of Viseu"): Infanta Beatriz of Portugal( 13 June 1430 – 30 September 1506) was a Portuguese infanta, daughter of John, Constable of Portugal( fourth son of King John I of Portugal and his wife Philippa of Lancaster) and Isabella of Barcelos a daughter of Afonso I, Duke of Braganza.
Relevant evidence: No