Correct spelling for the English word "yonnie" is [jˈɒni], [jˈɒni], [j_ˈɒ_n_i] (IPA phonetic alphabet).
The word "yonnie" does not have a well-established etymology. It is a slang term that is commonly used in some regions to refer to a young person or child, often in a playful or lighthearted manner. However, it does not have a known origin or etymological history. It is likely a colloquialism or a variation of another word that has slowly evolved over time within specific communities or regions.