The "Y" is effectively a vowel - as in Lysander - though I can't recall it being described as such at school. Ah! The mysteries (misteries?) of the English language! I suppose the Cirrus Moth might just have become Cyrus...
Iron City, is the Davis comapny you mention the same that produced the DA-1? I saw one at Old Rhinebeck last year which was a parasol monoplane with a radial.
Incidently, I think the Bramson Gipsy variations mentioned in my post above were more type-setting error (it was a very old copy of the mag!) than a mistake by Mr Bramson, whose excellent tome "The Tiger Moth Story" is an extermely well read and rather battered volume on my bookshelf now!