The 1851 census is the starting point to get a list of all Pughs, born in Llanfechreth, living in Merioneth in 1851. There are 99 listed on the query for such Pughs to the census date base.
To make this managable, let us just look at those born before 1800, and only the males (married females will only have married name Pugh). This gives us the list of 14 men below. The map above shows where they were in 1851:-
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Cadwalder Pugh, born abt 1799 at Llanfachreth, Merionethshire. Head. Living at Brithdir Uchaf Merionethshire with wife Catherine and children Hugh and Ann.
Evan Pugh, born abt 1794 at Llanfachreth. Head. Living at Isafon Merionethshire with dau. Ann
Evan Pugh, born abt 1800 at Llanfachreth. Head. Living at Nannaw Uwchafon Merionethshire with dau.Margaret
Griffith Pugh born abt 1799 at Llanfachreth. Head. Living at Towyn Merionethshire with children Catherine, Ann, Elizabeth and Hugh, but no wife.
Howel Pugh born abt 1798 at Llanfachreth. Head. Living at Llanfihangel Y Pennant Merionethshire with wife Margaret and dau.Margaret
Howel Pugh born abt 1794 at Llanfachreth. Brother. Living at Nannaw Uwchafon Merionethshire with Gwen Lloyd, head
Hugh Pugh born abt at 1783 Llanfachreth. Head. Living at Brithdir Isaf Merionethshire with wife Mary and 2 servants
John Pugh born abt 1780 at Llanfachreth. Laroner. Living at Llanddwywe Merionethshire with Mary Lewis, head
John Pugh born abt 1795 at Llanfachreth. Head. Living at Nannaw Uwchafon Merionethshire with wife Ann, and son John
John Pugh born abt 1772 Llanfachreth. Lodger. Living at Uchmynydd Merionethshire
Richard Pugh born abt 1788 at Llanfachraeth. Head. Living at Croggennant Merionethshire with wife Ann (my ancestor)
Robert Pugh born abt 1791 Llanfachreth. Head. Living at Nannaw Uwchafon Merionethshire with wife Elizabeth plus 6 kids
William Pugh born abt 1795 Llanfachreth. Head. Living at Dolgellau Merionethshire with wife Mary and dau Margaret
William Pugh born abt 1787 Llanfachreth. Head. Living at Garthgynfawr Merionethshirewith wife Catherine and dau Ann
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As this is the first census that we can trawl for information on a particular birthplace like Llanfachrech, the protagonists are aging too much to get much family information.
Most have stayed at Llanfachrech, or a few miles of it. It is difficult to see why my ancestor has gone off to Croggennant, near Llangelynin. He is a labourer, and his wife Ann was born Dolgelly.