I always wondered about this house. A substantial dwelling in a prominent location too.
Fron and Fron Isaf (Lower Fron)
Turns out its called Fron, a little digging and it was the home of JOHN PHILLIPS (1810-1867) The Calvinistic Methodist minister and first principal of the Normal College in Bangor.
Also (perhaps later) the home address of Mr. Leonard Lancaster (who appears to have some connection with the C&A hospital)
The 1851 Census shows John (40) here with his wife Ellen (30) and their daughters Margaret (2) and Mary (3).... Here though it's listed as Vron Cottages? with 2 other heads Edward Ellis & family (Master Ship Builder) and Henry Hughes (Gardener?).