|Died||19 July 1333|
|Father||William II, Earl of Ross|
|Mother||Euphemia de Berkeley|
He was the eldest son and heir of William II, Earl of Ross by his wife Euphemia de Berkeley, or Barclay.
Hugh was a favorite of King Robert I of Scotland, who endowed him with many lands. Hugh even married in 1308 Orkney Isles Robert's sister, Matilda/Maud Bruce (c. 1287 - aft. September 1323). Aodh's young brother, Iain, was given marriage to the Margaret Comyn, heiress of Buchan (although he died childless).
Marriages and issue
With Matilda, Hugh had several children, including Matilda/Marjory de Ross, wife of Malise, 8th Earl of Strathearn, his son and successor William de Ross, and John de Ross, who died on 27 May 1364 without issue.
By Margaret, Hugh had at least one daughter Euphemia de Ross, who married (1) John Randolph, 3rd Earl of Moray and (2) by dispensation (due to affinity) Robert Stewart, Earl of Strathearn, subsequently Robert II, King of Scots (1371–1390) as his second wife. Euphemia is sometimes incorrectly assigned as a daughter of Matilda, but this would have involved consanguinity in the 2nd and 3rd degrees which was not stated in the dispensation for her marriage to Robert Stewart. Hugh and Margaret Graham are usually also assigned a daughter Janet, wife of Sir John de Monymusk. This has been found to be erroneous, as Janet was actually Janet de Barclay, daughter of Margaret de Graham by her 2nd husband, John de Barclay of Gartley. All received prestigious marriage partners, including to the earls of Buchan and Moray, to Maol Íosa IV, Earl of Strathearn and the future king Robert II.
- Scots Peerage VII:234, cites a reference to a safe-conduct agreement that allowed Hugh to visit his father in prison in 1297.
- John P. Ravilious, Queen Euphemia and her ancestry, The Scottish Genealogist, June 2017, vol. LXIV(2) pp. 49-52. Prior publications including J. Balfour Paul's Scots Peerage identify Margaret de Graham in error as a daughter of Sir David Graham of Montrose.
- Robert and Euphemia were related in the 3rd degree of affinity, and 4th degree of consanguinity: Andrew Stuart, Genealogical History of the Stewarts, pp. 420–421
- Scots Peerage VII:237, cites Anderson's Dip. Scot., p. lix, and Earldom of Strathern, Nicolas
- John P. Ravilious, The Ancestry of Euphemia, Countess of Ross: Heraldry as Genealogical Evidence, The Scottish Genealogist, Vol. LV, No. 1 (March 2008), pp. 33–38
- Barrow, G.W.S., Robert Bruce and the Community of the Realm of Scotland, (Edinburgh, 1988)
- Sir James Balfour Paul, Scots Peerage, Vol. VII:234-237
- John P. Ravilious, The Ancestry of Euphemia, Countess of Ross: Heraldry as Genealogical Evidence, The Scottish Genealogist Vol. LV, No. 1 (March 2008), pp. 33–38
| Mormaer of Ross