William, age 19, is the son of Peter Ferguson, a mason and Susan Fitzpatrick. He married 01 Nov 1895 in Edinburgh Christina Brunton, age 17, dau of John Brunton, a quarryman and Christina McCracken, McLauchlon...(?) both deceased. [marriage cert]
William was born 06 Oct 1876 to Peter Ferguson and Susan Reily of 1 Fleshmarket Close High St , Edinburgh in the district of St Giles. [birth cert]
Peter Ferguson, age 20, bachelor and Susan Riley, age 19, spinster, married 13 Sep 1873 at St. Mary's Chapel, Edinburgh. He was the son of William Ferguson and Julia Duffy previously Ferguson M.S. Parker. She was daughter of Hugh Reilly and Agnes Fitzpatrick previously Reilly M.S. McInainey(?) [marriage cert]
It appears that William's marriage cert is error when his mother is named as Susan Fitzpatrick, somebody confused her maiden name with the other married name of William's grandmother Agnes.
According to the 1881 census Peter was born in Airdrie (Lanarkshire). I couldn't find a record of his birth but did find Thomas Ferguson born 14 October 1863 to William Alexander Ferguson and Julia Parker in Edinburgh. [OPR] According the 1861 census William A Ferguson was born 1822 Midlothian
Julia Duffy, age 45, widow of William Ferguson, comedian(?) and Michael Duffy, engine keeper died 24 Mar 1873. No parents listed. [Death Cert]
William died between the 1861 census and the death of Julia in 1873 but I could not find a record. He is probably the William Alexander Ferguson born 27 February 1820, Edinburgh to William Ferguson and Margaret Monro [OPR].
References
http://www.scotlandspeople.gov.ukhttps://familysearch.org===
Cheers,
Colin