If you're looking for a similar-sounding name in Spanish:
* Sinead: You can simply use the name "Sinead" as it is, as it is recognized and understood in Spanish-speaking countries.
If you're looking for a name with a similar meaning:
* Sinéad means "God is gracious" in Irish. You could consider names like Gracia (Grace) or Mercedes (Mercy) which carry similar connotations.
If you're looking for a name that is phonetically close:
* Ceneada: This is a name that is pronounced similarly to "Sinead." It is not a common name but could be an option if you want something unique.
Ultimately, the best way to translate "Sinead" into Spanish depends on your specific needs and preferences.