Socha is not in fact Irish for Sarah. Sorcha means brightness. Sarah is a Judeo-Christian name with no connection to Sorcha which is an ancient Irish name. In the irish language ch is pronounced like an english k; so it's correctly pronounced is Sor-ka.orcha means brightness. Sarah is a Judeo-Christian name with no connection to Sorcha which is an ancient Irish name. In the irish language ch is pronounced like an english k; so it's correctly pronounced is Sor-ka.