Allan

Crest: a comet, proper

Motto: Luceo sed terreo

Origin/Meaning:
From aluinn, fair, handsome

Citations:
Sanders, and J. Grant, British Crest: Containing The Crests and Mottos of the Families of Great Britain and Ireland; Together with those of the Principal Cities; and a Glossary of Heraldic Terms, Vol II, Edinburgh, Kirkwood & Sons, 1817
James Fairbairn, Fairbairn’s Book of Crests of the families of Great Britain and Ireland, Edinburgh, Grange Publising Works, 1892
Clifford Stanley Sims, The Origin and Signification of Scottish Surnames with a Volcabulary of Christian Names, Albany, N.Y., J. Munsell, 1862
W & A. K. Johnston, The Tartans of the Clans and Septs of Scotland,  With the Arms of the Chiefs, London, W. & A.K. Johnston, Limited, 1906