Johann Gottlieb Siegel (25 April 1699 - 1755) was a German legal scholar.
Johann Gottlieb was born on 25 April 1699 in Klosterhaseler, Saxony-Anhalt, the son of Pastor Johann Georg Siegel (1692-1728) and his wife Amanda Helen Elizabeth, daughter of Johann Gottfried Schuchardt, the Auditor of the dragoons . He attended the Gymnasium Illustre Augusteum in Weissenfels, returning home in 1714.
In 1717 he moved to the University of Leipzig where he attended lectures by Gottfried Polycarp Muller (1685-1747), Lueder Mencke (1658-1726), Johann Christoph Schacher (1667-1720) and Karl Otto Rechenberg (1689-1751). For further studies he went to the University of Wittenberg. The teachers at that time included Karl Jakob Spener (1684-1730), Johannes Balthasar Wernher, Heinrich Christoph Berger, Christian Basti Gebhard Neller, Gottfried Ludwig Mencke the Elder and Michael Heinrich Gribner In Wittenberg, on 29 June 1719 he acquired the Licentiate of the rights, and on 26 August 1720 he graduated as a Doctor of Law.
In 1734 Siegel was an attorney in Leipzig, Saxony at the Leipzig Consistory (for church matters) and the Oberhofgericht (Saxon Supreme Court). On 9 February 1735 he became Professor of feudal law at the Law Faculty of the University of Leipzig, and 1740 he became Counsel of the Leipzig merchants. He was general counsel of the University in 1741 and in the winter semester 1753/54 he was president of the Alma Mater.
Siegel married Anna Catharina, daughter of physician Jakob Schmidt, on 19 May 1722 in Klosterhaseler. He died in 1755 in Leipzig.
Diss. (Praes. G. L. Menckenio) de rescissione emtiotionis et venditionis ex tunc et ex nunc (vulgo ut vocant). Leipzig 1719Diss. de Indossato reconveniendo. Leipzig 1724Diss. de fundamento iudicialis pecuniae depositionis in Processu cambiali iure Electorali Saxonico admittendae. Leipzig 1725Diss. de creditoribus societatis privatis socii creditoribus non praeferendis. Leipzig 1725Progr. an servitus confusione exstinctu fundo serviente rursus alienato reviviscat? Leipzig 1725Diss. de legitimo successore hereditatem omitiente actionis funerariae reo. Leipzig 1725Diss. de iure congrui in Thuringia; vom Gespielde in Thuringen. Leipzig 1726Der vorsichtige Wechsel - Glaubiger. Leipzig 1726Diss. de iure pedum: vom Recht der Fusse. Leipzig 1726, 1744Diss. de cautione fideicommissorum nomine, praestanda. Leipzig 1728Progr. inaug. de litterarum reversalium feudalhim iustitia et nequitate. Leipzig 1735Diss. an hypotheca tacita in feudo debito feudali contrahatur? Leipzig 1736Diss. prima de litteris feudi reversalibus a simultanee investitis exbibitis; von Lehns - Reversen derer Mitbelehnten. Leipzig 1736, Diss. II. Leipzig 1738Diss. de rerum haereditariarum usucapione. Leipzig 1736Diss. de testatore suae voluntatis interprete. Leipzig 1737Principia iuris feudalis ex iure Imperii, Germanico, Longobardico, atque Electorali Saxonico deprompta, et usui fori accommodata.Leipzig 1738, Editio nova auctior. Leipzig 1746Tractatus de litteris investiturarum, von Lehnhbriefen cui varine litterarum investiturarium copiae, variaque praeiudicia novissima in appendice adiecta. Leipzig 1739Diss. de arbitrio, ex iuribus Romanis et Germanicis illustrato: von dem Ausspruch derer Schieds – Richter, nach Romisch- und Teutschen Rechten. Leipzig 1739Diss. de genuino privilegiorum conceptu. Leipzig 1741Diss. de feudo pignoralitio re fundamenti et utilitatis egena: vom Pfand-Lehn, als einer ungegrundeten und unnutzen Sache. Leipzig 1742Corpus iuris cambialis. Leipzig 1742Erste Fortfetzung des Corporis iuris cambialis Leipzig 1743Diss. de simultanea investitura, sine consensu Vasalli impetrata: von der Mitbelehnschaft, welche ohne des Lehn - Mannes Einwilligung erlanget wird. Leipzig 1743Diss. observationes forenses varii argumenti sistens. Leipzig 1745Diss. de feudo foemineo proprio. Leipzig 1745Diss. de dolo translationem dominii impediente. Leipzig 1748Diss. de divisione feudi successionem fimultanee investitorum non restringente. Leipzig 1748Diss. exhibens selecta iuris Rigensium cambialis capita explicata, atque observationibus illustrata. Leipzig 1751Progr. de iure superficiario reali quidem, ad dominium utile vero haud trahendo. Leipzig 1755Diss. de legitima ex feudo petenda. Leipzig 1755Progr. de invalida uxoris promissione da iurata SCti Vellejani renunciatione. Leipzig 1754Progr. de differentia inter feudum haereditarium in foeminas transitorium et foemineum. Leipzig 1754