The 13th Viscount, succeeding his father, is John Philip.
He has only one son, Geoffrey (b. 1996), who was born before his parents married.
Wikipedia lists Geoffrey has the ha, but since he was born prior to his parents' marriage, how could this be? Correct me if I'm wrong but I thought this only happened with certain Scottish peerages. The Galway viscountcy is an Irish peerage.
If he is not the ha, next in line would be a kinsman, Alan Stobart Monckton (b. 1934).
Please help.
Thanks.
Brooke