Caithness  is a Scotsman who executed the will of Andrew McMillan.
After the death of Andrew McMillan, Caithness traveled to New York City in search of Ray Stantz. He found the Firehouse and informed Ray he stood to inherit Castle Dunkeld and take on the title of duke. Caithness went on to explain the challenge Ray had to beat first.
- Caithness' name refers to a region in northern Scotland.