Stage of in this word's full journey.
Where does the word "posthumous" come from? It comes from Latin postumus, passing through Late Latin before entering English (1610s).
Posthumous’s story begins in Latin: postumus meant “last-born.” 'last', the superlative of posterus 'later', used of a child born after its father's death, as in the Roman name Postumus. By late antiquity, the word had taken hold in Late Latin as posthumus. An h crept in because writers misread it as post 'after' + humus 'earth, burial'. It reached English by 1610s as posthumous. Kept the mistaken h, and widened to anything that comes after death, such as a posthumous award. Today, posthumous means occurring or published after the death of its originator.