Sylphide vs. Sylphid

Sylphidenoun

A young sylph.

Sylphidnoun

(poetic) A young or little sylph.

Sylphidnoun

A little sylph; a young or diminutive sylph.

‘Ye sylphs and sylphids, to your chief give ear,Fays, fairies, genii, elves, and demons, hear.’;