Attention: Was younger than 16 years (0) when child (Joan Plantagenet,) was born (September 29, 1328) .
Attention: Was younger than 16 years (11) when child (RICHARD PLANTAGENET) was born (January 6, 1366) .
Attention: Was younger than 16 years (0) when child (England Joan) was born (September 29, 1328) .
She is married to Edmund Prince of England "Duke of York".
They got married on January 1, 1372 at Hertford, Hertfordshire, England, she was 17 years old.Source 2
They got married Mar1371 at Hertford, Hertfordshire, she was 16 years old.Child(ren):
http://trees.ancestry.com/pt/AMTCitationRedir.aspx?tid=6785497&pid=76330/ Ancestry.com