Born in the purple born into an imperial or royal family as a porphyrogenite; purple was originally the dye used for fabric worn by an emperor or senior magistrate in Rome or Byzantium.
born under a lucky star naturally fortunate; a proverbial phrase reflecting belief in planetary influences on one's fortunes.
born with a silver spoon in one's mouth proverbial expression for being born in affluence.
if you're born to be hanged then you'll never be drowned used to qualify apparent good luck which may have an unhappy outcome. Recorded from the late 16th century; a similar saying, ‘he cannot drown who must hang,’ is recorded in mid 14th-century French.
See also born within sound of Bow Bells, because a man is born in a stable that does not make him a horse, to the manner born.