Sir William Ruthven of that Ilk

SIR WILLIAM RUTHVEN Lord of that Ilk

It has been supposed that Sir William Ruthven, lord of that Ilk, is the son of William Ruthven and his wife Johanna but this should not be regarded as certain.
The Scots Peerage IV: pp. 256-57

Evidence from the National Records of Scotland

                   1

24 September [1395]: Extract under the subscription of John Skene, clerk register, of charter by King Robert II to William Ruthven, knight, of office of sheriff within the sheriffdom of Perth. Witnesses: Walter and Mathew bishops of St Andrews and Glasgow, Robert earl of Fiffe and Menteth the King's brother, Archibald earl of Douglas lord of Galloway, Master Duncan Petyt archdeacon of Glasgow chancellor, James Douglas lord of Dalkeith and Thomas Erskin. Linlithgou. National Records of Scotland, Records of Perth Burgh, reference B59/23/5

                   2

10 December 1408: Charter by William de Ruthwen, knight, lord of that ilk to John Trayle of his templelands in the town of Malgask. National Records of Scotland, Miscellaneous small collections of family, business and other papers, Fife writs, reference GD1/349/3

                   3

10 December 1408: William de Ruthwen in favour of John Trayle of the Templar lands within the town of Malgask. Dated at Ruthwen. National Records of Scotland, Transcripts and photocopies of Miscellaneous Charters and Papers, reference RH1/2/177

Genealogy

The Scots Peerage; founded on Wood's edition of Sir Robert Douglas's peerage of Scotland; containing an historical and genealogical account of the nobility of that kingdom. Edited by Sir James Balfour Paul, Lord Lyon King of Arms. Volume IV (David Douglas, Edinburgh, 1907), pp. 254-68 for Ruthven, Earl of Gowrie