Late 15th century; earliest use found in Robert Henryson (d. c1490), poet. From Anglo-Norman and Middle French quieté from quiete + -té; compare -iety. Compare post-classical Latin quietas, Spanish quietad, both rare.
Definition of quiety in US English:
quiety
nounˈkwʌɪəti
rare
Quietness; calmness, peace, tranquillity.
Origin
Late 15th century; earliest use found in Robert Henryson (d. c1490), poet. From Anglo-Norman and Middle French quieté from quiete + -té; compare -iety. Compare post-classical Latin quietas, Spanish quietad, both rare.