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Beatriz Pereira de Alvim
Beatriz
Pereira
de
Alvim
was a Portuguese noblewoman, the
only child
of
Nuno Álvares Pereira
and his
wife
Leonor de Alvim
.
On
8 November
1401, she
married
Afonso, Count of Barcelos
,
illegitimate son
of king
John I of Portugal
. She
died
before her husband became
Duke of Braganza
.
Afonso
and Beatriz had three children.
Afonso of Braganza
, 4th
Count of Ourém
and
1st
Marquis of Valença
, had a
natural son
from
Dona
Brites de
Sousa
. His issue took the name
de Portugal
Isabella of Braganza
, married her uncle
Infante John, Lord of Reguengos
, son of
John I
of Portugal
Ferdinand I, Duke of Braganza
, succeeded his father as second
Duke
of Braganza
