chelys

“Doni [8] mentions the barbiton, defining it in his index as _Barbitos seu major chelys italice tiorba_, and deriving it from lyre and cithara in common with testudines, tiorbas and all tortoiseshell instruments.”

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon"

“Scilicet hic illi meditantur pondera mores; hic premitur fecunda quies uirtusque serena fronte grauis sanusque nitor luxuque carentes deliciae, quas ipse suis digressus Athenis mallet deserto senior Gargettius horto; 95 haec per et Aegaeas hiemes Hyadumque niuosum sidus et Oleniis dignum petiisse sub astris, si Maleae credenda ratis Siculosque per aestus sit uia: cur oculis sordet uicina uoluptas? hic tua Tiburtes Faunos chelys et iuuat ipsum100”

A Villa at Tibur

“From the Persians and Arabs we learn that it was a kind of _rebab_ or lute, or a chelys-lyre, [3] first introduced into Europe through Asia Minor by way of Greece, and centuries later into Spain by the Moors, amongst whom it was in the 14th century known as _al-barbet_. [”

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon"