I have a David John Hume (or Evans) born 9 January 1863 in Edinburgh, Scotland - mother Rosina Evans and father David Hume.
I also have a David Hume born 1868 in Forfar, Angus, Scotland - mother Rosina Evans and father David Hume. As others have mentioned, Rosina was by that time married to Alfred Burrows and David is listed as a stepston.
I am related to James Ord Hume who was born in 1866. I can't find his birth details but he is referred to as being the child of Rosina and David Hume.
I think that Rosina was a daughter of Thomas Evans and Caroline Ord (hence the Ord). There's some suggestion that Caroline Ord is related to Thomas Ord who was a famous equestrian.
Happy to share more information if you'd like to let me know your email?