MuChinese From Chinese 穆 (mù) meaning "pure, solemn, honest".
PaterDutch From Latin pater ‘father’, also used to denote the father superior in a religious order, hence probably a nickname for a "solemn" or "pompous man."
TõsineEstonian Tõsine is an Estonian surname meaning "serious" and "earnest".
YanChinese From Chinese 严 (yán) meaning "strict, solemn, stern".