Yes, that's my great granddad.
His father David Millar - a weaver, if I remember correctly - and mother Helen/Ellen Miller moved to Glasgow and then Edinburgh at the end of the nineteenth century. Ellen died quite young and David remarried a Janet Duthie. Hugh had a brother Alexander. By way of Fife, Hugh ended up in Shiremoor, Northumberland, to work in the pits there. Hotspur Place was part of the 'original' Shiremoor - the family moved to nearby Duchess Street, which was built soon after. The Middletons lived on Duke Street, I think, which backed onto Duchess.
Hugh never discussed his past and his children (my nana included) thought he had been brought up in a children's orphanage. As it happened, he was born illegitimate. But I think David was his father - he and Ellen married in Glasgow soon after. My dad is called Hugh Millar Sharp, as he was born on 26 January, the birthdate of his granda Hugh!
Mick