Among these lords Orcagna drew Castruccio, the lord of Lucca, a youth of the most striking aspect, with a blue hood bound about his head and a SPARROWHAWK on his hand.
"The Lives of the Painters, Sculptors & Architects, Volume 1 (of 8)"
Giorgio Vasari
One presents him with a golden pigeon-hawk, another with a setter-dog, this one a greyhound, this other a SPARROWHAWK, and another a swift Arab steed, this one a shield, this one an ensign, this one a sword, and this a helmet.
"Four Arthurian Romances "Erec et Enide", "Cliges", "Yvain", and "Lancelot""
Chretien DeTroyes
It is found already in Anglo-Saxon as a personal name, and the full SPARROWHAWK also exists.
"The Romance of Names"
Ernest Weekley