displeasure, proper name
馮 centers on a sense of displeasure or emotional weight, and it is also used as a proper name. The two meanings do not share one clear conceptual center.
馮 combines 冫 (ice) and 馬 (horse). The historical connection between ice and a horse to express displeasure or a proper name is uncertain.
A horse 馬 standing on ice 冫 looks displeased and uncomfortable, matching the core meaning of displeasure.
For ヒョウ, imagine a displeased horse letting out a loud 'hyou' sound as it slips on the ice: hyou -> ヒョウ.