模範 (もはん) uses on'yomi. 模 (モ) means "model" or "pattern," often with the tree radical (木). 範 (ハン) also means "pattern" or "rule," often with bamboo (竹). Together, they signify an excellent model or standard to be followed. ぼはんは模の誤読、もまんは範の誤読です。

模範 (もはん) は、両方とも音読みです。模も範も「手本」の意味で、他人が見習うべき優れた手本や標準を指します。ぼはんは模の誤読、もまんは範の誤読です。