The given name Jasher is believed to have its origins in the Hebrew language and culture. The name is derived from the Hebrew word "yashar," which means "upright" or "righteous." It is a relatively uncommon name, but has been recorded throughout history.

One of the earliest references to the name Jasher can be found in the Bible. In the Book of Joshua (10:13) and the Second Book of Samuel (1:18), there are mentions of the "Book of Jasher," which was an ancient text that has been lost to history. This suggests that the name may have been in use during biblical times.

The first recorded person with the name Jasher was Jasher ben Kaleb, a scholar and philosopher who lived in Spain during the 12th century. He was known for his contributions to the study of Jewish law and ethics.

Another notable figure named Jasher was Jasher ben Yehuda, a Jewish poet and philosopher who lived in Spain during the 13th century. He wrote extensively on topics related to Jewish mysticism and philosophy.

In the 16th century, Jasher ben David was a prominent rabbi and scholar who lived in Italy. He was known for his commentary on the Talmud and his teachings on Jewish law.

In the 19th century, Jasher Rosin was a Russian-American author and journalist who was born in 1830. He wrote several books on Jewish history and culture, and was a vocal advocate for Jewish rights in Russia.

Jasher Chassid was a Polish-born American rabbi and author who lived from 1866 to 1945. He wrote extensively on topics related to Jewish ethics and spirituality, and was a respected leader in the Orthodox Jewish community.

While the name Jasher is not as common today as it once was, it has a rich history and has been borne by many notable figures throughout the centuries. Its meaning of "upright" and "righteous" has likely contributed to its enduring appeal among those of Jewish and Hebrew heritage.