Here's a listing of the commonly known (in Chaos) members of the royal family of Amber. It's generally assumed that all the grandchildren aren't accounted for and there are certainly some children long enough dead that they've been forgotten.
BenedictEric, slain in the Patternfall war by the armies of Chaos
Deirdre, slain in the Patternfall War by Brand/Caine
Bleys, son of Oberon and Clarissa
Fiona, daughter of Oberon and Clarissa
Llewella, daughter of Oberon and Moins of Rebma
Brand, son of Oberon and Clarissa, slain in the Patternfall War by Caine
Alexander: son of BenedictMerlin: son of Corwin; Duke of Sawall