Seidy is of Spanish origin, derived from the Hebrew name 'Sedecia', which means 'justice of the Lord'. It's a unique and charming name, often pronounced as 'say-dee'. The name gained popularity in Spain during the Middle Ages, likely due to its biblical association with King Zedekiah of Judah. In some cases, Seidy may also be considered a variant spelling of the name Cidea, which has Italian roots. Despite its origins, Seidy is not exclusively used in Spanish-speaking countries and can be found around the world, adding a touch of international flavor to any group or family.
"Seidy appears to have been quite popular as a girls' name in the late 90s and early 2000s, with peaks of 15 and 17 births in 2003 and 2007 respectively. However, its popularity has since declined, with fewer than 10 births per year since 2009."