Janis is a proper noun, typically a female given name, though sometimes a surname. In pronunciation guides, it’s treated as two syllables with stress on the first: YA-nis. The name’s precise vowel quality can vary by accent, but the standard English rendering emphasizes a clear /æ/ or /æ/ vowel in the first syllable and a short /ɪ/ in the second, yielding a two-syllable, trochaic pattern.
Full pronunciation guide