A Simm is any mountain in Britain or Ireland with a prominence over 30m and a height above 600m.
A Hewitt (Hill in England, Wales and Ireland over Two Thousand) is a mountain in England, Wales or Ireland with a height over 2,000ft and a prominence greater then 30m.
An Arderin is a mountain in Ireland with a height greater then 500m and a prominence greater 30m.
A Dillon is a peak featured in Paddy Dillon's book: Irish 2010 climbing guidebook: "The Mountains of Ireland"
A Vandeleur-Lynam is a peak in Ireland with a height greater then 600m and a prominence greater then 15m.