Ill-famed is an adjective that refers to something or someone who has a bad reputation, is notorious or infamous. The antonyms for ill-famed, which would mean the opposite, could be a variety of different words, including well-known, esteemed, well-regarded or respected. Another opposite of ill-famed could be "renowned," "prestigious," or "reputable," which would imply that the person or thing is widely recognized for their good deeds, qualities, or achievements. In contrast, other antonyms for ill-famed might include any words that express positivity, such as honorable, trustworthy, or high-status, among many others.