Roi is a masculine given name of French origin, pronounced as a single-syllable vowel-consonant sequence in many contexts; in some languages it may function as a title or a proper noun. It is often realized with a long /ɔ/ or /w/ glide depending on language influence. In English contexts, it’s typically treated as a proper noun and pronounced with careful vowel shaping to avoid an English diphthong. The term can also appear in historical or literary references as a name rather than a word with semantic meaning.
Full pronunciation guide