Ormus was a Kingdom in the 17th century around the Arabian Gulf. Its capital was the city of Ormus.
"The Kingdome of Ormus
hath his owne King tributarte
vnto the King of Lu∫itania. it
containeth the whole shore of
Arabia from the passage of the
riuer Euphrates vntil C. Raz. alga
ti, likewi∫e part of the Kingdome of
Per∫ia w.adioyneth to the Sea Ba∫ora
and almo∫t al the Ilands of the per∫ian
Gulfe whose mothe r?itie is Ormus
in the Iland Geru
a famous mart"
-- John Speed, 1626
Compare to Ohrmuzd, Hormuz, Ohrmazd, Ahura Mazda