- 外孙子 wàisūnzi grandsonone's daughter's son (colloquial)
- 重孙子 chóngsūnzi great-grandson
- 孙子兵法 Sūnzǐ Bīngfǎ Art of War“Art of War”, one of the Seven Military Classics of ancient China, written by Sun Tzu.
- 孙子定理 Sūnzidìnglǐ Chinese remainder theoremthe Chinese remainder theorem
- 龟孙子 guīsūnzi bastarda derogatory term used as an insult, similar to son of a bitch
