Diminutive of Harriet, feminine of Harry/Henry, meaning 'ruler of the home.'
Hattie began as an affectionate diminutive of Harriet, which itself is the English form of the French Henriette, the feminine of Henri. The deeper root lies in the Germanic name Heimirich, composed of elements meaning home and ruler. Like many nickname forms that became names in their own right, Hattie started in the intimate sphere of family speech: warm, lively, and informal.
In the 19th century, especially in Britain and the United States, it flourished at a time when diminutives such as Hattie, Mattie, and Nettie were widely used both affectionately and officially. The name carries strong Victorian and early American associations, which is part of its charm today. One of its most notable bearers was Hattie McDaniel, the groundbreaking actress who became the first African American to win an Academy Award, a historical association that gives the name cultural weight beyond its sweetness.
Hattie also appears in period fiction and historical records often enough to evoke porches, handwritten letters, and the domestic texture of another era. After declining in the mid-20th century, it returned as part of the revival of vintage nickname names, alongside Sadie, Millie, and Maisie. Modern ears hear Hattie as spirited and antique in the best sense: brisk, affectionate, and full of character, with a history that moves from nursery nickname to stylish revival.