Lǚ Jìng 呂靜 (fl. late third – early fourth century), a Jìn 晉 phonologist. The son of Lǚ Chén 呂忱 (compiler of the Zì lín 字林, the Shuōwén successor lost in the Sòng). Suí shū jīngjí zhì 隋書‧經籍志 records his Yùn jí 韻集 (KR1j0111) in five juàn — the principal Jìn-period rhyme dictionary, refining and extending Lǐ Dēng’s 李登 Shēng lèi KR1j0110. The Yùn jí was lost in the late Táng or Sòng; surviving fragments are preserved chiefly in 顏之推’s Yánshì jiāxùn ‧ Yīn-cí (which famously criticizes the Yùn jí for collapsing chéng-réng and hóng-dēng into two rhymes), in Lù Démíng’s Jīngdiǎn shìwén, and in Buddhist yīnyì; reconstructed in CHANT. No biography in any standard history; the Lǚ Chén / Lǚ Jìng father-son pair is the principal Jìn-period xiǎoxué lineage. CBDB has no matching entry.