Will the real John Douglas please stand up?

[William Douglas]

The excellent website, Secret Scotland, lists several Sir John Douglases. Can anyone help sort them out?

Lt.-Gen. Sir Neil Douglas of Glenfinart
Invested as a Knight Commander, Order of the Bath (K.C.B.). Father of General Sir John Douglas of Glenfinart.

General Sir John Douglas of Glenfinart
Son of Lt.-Gen. Sir Neil Douglas of Glenfinart. He married Lady Elizabeth Cathcart (d. 27 February 1896), daughter of General Sir Charles Murray Cathcart, 2nd Earl Cathcart and Henrietta Mather, on 1 June 1843. General Sir John Douglas of Glenfinart was Commander of the Forces in Scotland, gained the rank of Colonel in the service of the 79th Foot, and was invested as a Knight Grand Cross, Order of the Bath (G.C.B.).

Major-General John Douglas
Was born before 1827. He married Rosa Maria Paget, daughter of Rt. Hon. Sir Arthur Paget and Lady Augusta Fane, on 10 March 1842. 1 He died on 10 May 1871, without issue. Invested as a Companion, Order of the Bath (C.B.). He gained the rank of Major-General in the service of the 11th Hussars. He lived in Glenfinart, Argyllshire, Scotland.

General Sir John Douglas, G.C.B.
1817 - 1888. Of the 79th Cameron Highlanders (sometime between 1873 - 1886). The sources make no reference to his home.

General Sir John Douglas, G.C.B.
At Kilmun (St Munn's) Parish Church, against the north wall of the tower can be seen a mort-safe. Within a red sandstone vault lies General Sir John Douglas, G.C.B.

Sir John Douglas
Was born before 1848. He lived in Glenfinart, Argyllshire, Scotland. Invested as a Knight Grand Cross, Order of the Bath (G.C.B.). Father of Charles John Cathcart Douglas (b. b 1864, d. 25 Apr 1926).

Charles John Cathcart Douglas
Was born before 1864. The son of Sir John Douglas. He married Helen Tolmie Dick Bayly, daughter of General John Bayly and Jane Crum-Ewing, on 17 November 1880. He died on 25 April 1926. Charles John Cathcart Douglas held the office of Deputy Lieutenant (D.L.).