孟

noun: eldest (among siblings), first (in a series), surname Meng
孟

Character 孟 is highly polysemous on Wiktionary (eldest sibling, first month of a season, Mon people, short for 孟子/孟加拉, alternative form of 猛, surname); picked the classical 'eldest sibling' sense listed first, but modern standalone usage (often as surname) is uncertain.