Judah Leib the Elder (Hebrew: יהודה לייב הזקן died 1539) was a 16th-century Czech rabbi based in Prague, who is of great genealogical significance due to his alleged descent from King David.

[2] Shlomo Englard commented that the most probable reason for Perels death date of 1439 was due to a mistranscription of the grave of Judah Leib the Elder.

[1] Several scholars such as Moshe Yair Weinstok and Yaakov Leib Shapira argued that this Geonic line could be paternally traced back to Yosef, the eldest son of Hai Gaon (939-1038) who was a legitimate descendant of the Davidic Exliarchs.

Similar dubious genealogical claims have been made relating to the ancestry of Judah Leib the Elder back to Samuel ibn Naghrillah (993-1056), also of the Davidic line.

Meir Perles also claims that Judah Leib's sister was the mother of Avigdor Kara who died in 1439.