The compound "then-governor" is a modern English formation that combines a native temporal adverb with a Latinate noun of office. The word "then" originates from Proto-Germanic, maintaining its core function of indicating a specific past time. "Governor" has a more complex journey, deriving from the Latin gubernator, meaning a helmsman or pilot, which itself was borrowed from the Greek kybernētēs. This nautical metaphor of steering a ship evolved into the abstract concept of directing the affairs of a state. When prefixed with "then," the compound logically specifies that the individual being referred to was the holder of the gubernatorial office at that prior time, creating a precise title for historical or journalistic context.

Structure: then (time) + governor (official) - then: From Old English þonne, þænne, meaning "at that time, in that case." It functions as a temporal qualifier. - governor: From Old French governeor, from Latin gubernator ("director, ruler"), from gubernare ("to steer, govern"). It functions as the core noun denoting the officeholder.