Papa
Denny Doherty, Toronto, 1942-2007: singer, songwriter, one of the four members of The Mamas & the Papas.
Appended (January 23), a truly awesome 1960s' video of The Mamas & the Papas performing "California Dreaming." Denny is the shorter of the two men. (The other is the late John Phillips. And of course you know the women, the incomparable and much-missed Cass Elliot and the enduring Michelle Phillips.)
Regarding Doherty, see also the New York Times obituary by Ben Sisario.