If an island is a deserted island; when, why and who deserted it?

Synonyms of deserted

left unoccupied or unused ·We had the deserted beach all to ourselves.

Synonyms of deserted

abandoned, derelict, desolate, disused, forgotten, forsaken, rejected, vacant, vacated, void

Words Related to deserted

ignored, neglected, unattended, untended

castaway, cast-off, discarded, jettisoned, junked, refuse, waste

godforsaken, miserable, shabby, wretched

empty, idle