Jean-François Séguier, French astronomer and botanist (d. 1784)
Jean-François Séguier (French pronunciation: ​[ʒɑ̃ fʁɑ̃swa segje]; 25 November 1703 – 1 September 1784) was a French archaeologist, epigraphist, astronomer and botanist from Nîmes.

He studied law in Montpellier, during which time, he developed a passion for botany. He was a friend and collaborator to Scipio Maffei, with whom he took an extended scientific tour throughout Europe (1732–36). In 1755 he became a member of the Académie de Nîmes, serving as its secrétaire perpétuel from 1765 to 1784. In 1772 he became a member of the Académie royale des Inscriptions et Belles-Lettres.The plant genus Seguieria (family Petiveriaceae, Loefl., 1758) commemorates his name, as do the botanical species Ranunculus seguieri (Vill., 1779), Euphorbia seguieriana (Neck., 1770), and Dianthus seguieri (Vill., 1779).