Lǐ Tóng 李彤 (fl. third or fourth century), a Jìn 晉 paleographer-lexicographer known principally as the compiler of two character-form glossaries: Zì zhǐ 字指 (KR1j0103) and Jí gǔ zì 集古字 / Jí zì 集字 / Qí zì 奇字 (all routinely cited together by Guō Zhōngshù 郭忠恕 in KR1j0026 Hànjiǎn). The Suí shū jīngjí zhì 隋書‧經籍志 records the Zì zhǐ in two juàn; all his works are lost, surviving only in Hànjiǎn-tradition paleographic citations. No biography in any standard history; sometimes speculatively placed at the Eastern-Jìn court but no firm identification. CBDB has no matching entry.