Well, I don't know for sure, I was assuming that the lady next to him was his wife. Wasn't he involved for many years with one of the Gabor sisters? I think it was Eva.
I think the blonde is Maureen Reagan's (what a lady she was!!) widowers new lady friend.
I just read an interview with Merv Griffin recently...he's not married. (And yes, he had a long relationship with a Gabor sister.)
The pretty blonde lady is Dennis Revell's fiancee. Dennis was Maureen's husband...she died in 2001. I believe Dennis and Maureen had an adopted daughter, who was not present today (too young?). I thought it was very nice and classy that Dennis, who was married to Maureen for many years, was included as a member of the immediate family and that his fiancee was made welcome.