The literary character 母 is Chinese, spoken word はは is not, and some believe old pronunciation was closer to papa.

Bonus: ちち covers both titty and daddy. Food for thought. And babies too, I guess.

Wiktionary seems to disagree, saying it’s a Japanese origin word. https://ja.m.wiktionary.org/wiki/はは

At least in modern mandarin mom is “ma”, but Chinese has so many dialects …