Lady Bulwer's brother

Bulwer
Allegiance	House Bulwer
Culture	Reach
Father	Jon Bulwer (supposed)
Mother	Victaria Tyrell (supposed)
Book	A Feast for Crows (mentioned)

Lady Bulwer's brother is a member of House Bulwer.

Recent Events

A Feast for Crows

Lady Taena Merryweather reports to Queen Cersei Lannister the rumor of Megga Tyrell, Queen Margaery's cousin and lady-in-waiting, marrying Lady Bulwer's brother.

Family

Jon

Victaria Tyrell

Jack

Alysanne

Son

This character is only mentioned in passing once in the series, it is unclear who he really is. Several possibilities have been brought up:

1. Lady Alysanne Bulwer's brother:
   Alysanne is the current head of House Bulwer, and has been ever since her father, Lord Jon Bulwer, died of a summer fever. If Alysanne had a brother, even a younger one, he should normally have inherited before her. It is therefore possible that this brother is a bastard, who has no inheritance rights unless he is legitimized. It is however surprising that a cousin of the Queen Consort of Westeros has no better suitor than a bastard. The other possibility is that Lady Alysanne's mother, Victaria Tyrell, has remarried after Jon's death and given a son to her new husband. However, if that were the case, this new marriage should appear in the appendices, but it is not.
2. Lady Victaria Tyrell's brother:
   With her marriage to Lord Jon Bulwer, Victaria became "Lady Bulwer". Taena might refer to her brother, and not her daughter's brother. Lady Victaria does indeed have a brother, Ser Leo Tyrell, but he is still married to Alys Beesbury who is still alive. No other brother is known to Victaria Tyrell. Therefore this possibility seems unlikely.
3. Taena's invention:
   The rumor could be false or misunderstood by Taena. This possibility would be consistent with the total absence of this character in the appendices.
4. A mistake:
   George R. R. Martin made a little mistake that should be fixed in future editions of A Feast for Crows.