DEYNARD (DEINARD) Ephraim (Efraim) (1846, Sasmaken, Courland Governorate – 1930, St. Louis, Missouri, USA), bibliographer.

From a young age, Ephraim Deynard displayed a passion for travel aimed at studying Jewish life in various countries. He undertook his first journey at the age of 16. In 1873, he met the renowned Karaite scholar A.T.S. Firkovich and joined him in Crimea, assisting in the inventory of ancient Jewish manuscripts that Firkovich intended to sell to the Imperial Asian Museum in St. Petersburg.

In 1874, Deynard travelled through Eastern countries. In 1878, the Paris-based Alliance Israélite Universelle commissioned him to compile global Jewish population statistics. In 1888, A. Kaufmann sent him to Eretz Israel to assess the feasibility of founding agricultural settlements there.

In the 1880s, Ephraim Deynard established a Jewish book agency in Odessa, which amassed a significant collection of rare publications. From 1888, he lived in the United States, settling in Arlington. The following year, he began publishing a weekly newspaper in Hebrew. In 1891, he launched a Zionist newspaper in Yiddish, Patriot. In 1897, he founded a Jewish agricultural colony in the state of Nevada. Between 1899 and 1909, he made three expeditions to the East in search of rare Jewish manuscripts.

Deynard authored numerous books in Hebrew, mainly of a bibliographic nature. In 1926, he published a bibliography listing all books printed in Yiddish and Hebrew in America since 1735. He settled in Eretz Israel in 1913, but during World War I, he was arrested by the Ottoman authorities and expelled in 1916. Returning to the United States, he continued his bibliographic research.