What does Sable mean?
A word-name from 'sable', which in heraldry denotes the colour black; derived via Old French from the dark-furred sable marten. Note: a vocabulary name, with the 'black' meaning coming from the heraldic term.
What does Marlowe mean?
An English habitational surname from Marlow in Buckinghamshire, from Old English 'mere' (lake, pool) + 'laf' (remnants, leavings), i.e. marshy ground left after a lake was drained. Often loosely glossed 'driftwood'. It also recalls the Elizabethan playwright Christopher Marlowe.