Please read Alexey Sklyarenko's annotations on Pale Fire, Ada and other Nabokov works here.
Describing his rented house, Kinbote (in VN’s novel Pale Fire, 1962, Shade’s mad commentator who imagines that he is Charles the Beloved, the last self-exiled king of Zembla) mentions his landlord’s four daughters (Alphina, Betty, Candida and Dee) and calls Judge Goldsworth "the head of this alphabetic family:"
Lines 47-48: the frame house between Goldsworth and Wordsmith