Protectorian
/prəˌtɛkˈtɔːrɪən/Now historical and rare
adjective
Of, relating to, or supporting the Lord Protector or the Protectorate; Cromwellian.
Origin
Mid 17th century; earliest use found in William Cole (c1622–1701), naturalist. Either from post-classical Latin protectorius protectory + -an, or from protector + -ian.