Arms for Udny of the Ilk have been recorded on three occasions in the Lyon Register; 1672-7, 1748–51 and 1789.
The family Udny of Udny possessed the barony of Udny in Aberdeenshire for several generations prior to 1875. The name has been spelled sometimes as Widney and Uldney.
Scottish folk singer Jock Duncan said about the pronunciation of Udny, when commenting on his song about the Aberdeenshire town of Udny on his CD Ye Shine Whar Ye Stan!: "I’ve heard many versions o it - an tunes an aa, fen I wis young. Widney wis the pronunciation. Never naebody heard o Udny: ‘It’s Widney boy - are ye gaun doun tae Widney the nicht?’"
^ abcWay, George and Squire, Romily. Collins Scottish Clan & Family Encyclopedia. (Foreword by The Rt Hon. The Earl of Elgin KT, Convenor, The Standing Council of Scottish Chiefs). Published in 1994. Page 467.