Meaning and Name Origin
Ernesta \e-rnes-ta, er-ne-sta\ as a name for girls. The name Ernesta means "serious; battle to the death". Ernesta is a variant of Ernestine (Old German). Only rarely used as a name for children. See also Erna and Nesta.
Ernesta is an unusual given name for women. Ernesta is an equivalently unusual last name too for all people. (2000 U.S. Census)
Below is a graphed analysis of the popularity of Ernesta and associated names. Ernestine, Ernestina, Erna and Earnestine are the popular variation forms of Ernesta (#unlisted) rated in the Top 1000. These girl names were at the height of their popularity during 1930-1939 and have become significantly less popular since, with the forms Ernestine, Ernestina, Erna and Earnestine becoming less trendy. (2014 Birth Statistics)