The name Staci is a feminine variation of the masculine name Stanislaus, which has its origins in the Slavic languages. Stanislaus is derived from the Slavic words "stan" meaning "to stand" and "slava" meaning "glory" or "fame." The name Staci is a shortened and anglicized version of this name.

The name Stanislaus has a significant religious history, as it was the name of a Polish saint who lived in the 11th century. Saint Stanislaus of Cracow was a bishop who was martyred for his defense of the church's rights against the oppressive rule of the Polish king. His name became popular in many Christian communities, particularly in Eastern Europe and the Catholic Church.

One of the earliest recorded examples of the name Staci dates back to the 16th century, when it appeared in English records as a diminutive form of Stanislaus. Over time, it became an established name in its own right, particularly in English-speaking countries.

Throughout history, several notable women have borne the name Staci. One of the earliest examples is Staci Lander, an English actress and writer who lived in the 17th century (c. 1630-1695). Another notable Staci was Staci Roest, a Dutch painter and illustrator from the late 19th century (1859-1942).

In the 20th century, the name Staci gained popularity, particularly in the United States. One of the most well-known individuals with this name is Staci Keanan, an American actress best known for her role as Dana Foster on the sitcom "Step by Step" (born 1975).

Other notable Stacis include Staci Greason, an American author and journalist (born 1964), and Staci Lander, an American singer and songwriter (born 1970). Additionally, Staci Manizade was a prominent American activist and advocate for LGBTQ+ rights in the late 20th century (1945-2020).

While the name Staci has been influenced by various cultures and languages, its roots can be traced back to the Slavic word "slava," which represents the concept of standing tall and achieving glory or fame. This name has a rich history spanning various regions and time periods, with notable individuals leaving their mark in various fields.