Ffriddfach and Ffriddfechan are variations of the same name.
There are three families living in Ffriddfach Llanenddwyn in 1861.
One is a family headed by Edward Evans an agricultural labourer.
The other two are Jones families who may, or may not be related to your people or to each other.
RG9/4321 Folio 15 Sched 12
Richard Jones Head mar 52 Bl Smith Ffestiniog
Jane Jones Wife Mar 45 Trawsfynydd
Jane Jones Dau un 14 Ffestiniog
Elinor Jones Dau 10 Ffestiniog
William J Roberts son 8 Ffestiniog
Elizabeth A Jones Dau 1 Ffestiniog
RG9/4321 Folio 15 Sched 14
(The head of this household is away)
Elizabeth Jones Dau Un 14 Housekeeper Llanwddyn
Richard Jones Son 10 Llanwddyn
William Jones Son 7 Llanwddyn
(Information provided by the National Archive and subject to crown copyright)