Sandy m, f
2 (f.) English: pet form of ALEXANDRA (SEE Alexandra) or SANDRA (SEE Sandra), now sometimes used as an independent given name.
3 (m., f.) English: nickname for someone with a crop of ‘sandy’ (light reddish-brown) hair.
Variants: Sandie f. (Of 1 only): Scottish: Sandaidh (Gaelic).
First names dictionary. 2012.