Lyons is a proper noun referring to the surname or a place name, often used as a surname in English and as a toponymic identifier. In speech, it typically functions as a monosyllable or near-monosyllable, with a long-high front vowel onset softened by a trailing /z/ or /ən/ depending on usage. The word is frequently pronounced like “Lion” with a schwa or a light /z/ ending in many contexts.
Full pronunciation guide