Is it a sin to name a daughter "Sandy," and should it be changed based on its potential meanings as a foreign name, such as "son of Alexander," "savior of mankind," "sandy," or "defender of humanity"?

The name "Sandy" is a Greek feminine diminutive of "Sandra" or "Alexandra," or it originates from "Candace," meaning "the radiant" or "the glowing." It is advisable to avoid non-Arabic names if their meaning is not confirmed, for fear of them contradicting religious principles. It is recommended to change this name for your daughter to a good Muslim name, in accordance with the Prophet's (peace be upon him) saying: "Leave that which makes you doubt for that which does not make you doubt." It is also from the Sunnah to change names to better ones, as the Prophet (peace be upon him) changed the name "Aasiyah" to "Jamilah."