Alwhat, Allwhat (OS Name Book Kirkcudbrightshire 1844-51); Note the burn that runs off the hill on the Kirkcudbrightshire side is known as Allwhat Burn.
In his notes on the place-names elements ail-, al- Sir Herbert Maxwell offers the derivation of Alwhat as ail chat (haat) ‘cliff of the wild cat’. The form Alquhat supports this derivation, i.e, quhat = chat
An alternative offering of Gaelic al ‘a rock’ and fada‘ long’ is given in the Ordnance Survey Name Book 1848-51 Kirkcudbrightshire Volume 5.
 Edward Dwelly Illustrated Gaelic-English Dictionary (1902-1912)