Mack
Meaning
short form of Mac- surnames, Gaelic for 'son of'
The story
Mack is the Gaelic mac, son of, promoted from prefix to the whole name, the surname sound America wore as a first name through the first half of the century: about 3,900 in the 1910s, 5,500 in the 1920s, 5,700 in the 1940s. Then the long ebb to about 1,000 in the 1990s, and the grandpa-name turn: 3,200 in the 2010s and already 3,600 so far this decade, the same road Otto and Arthur are walking, Otto at 6,500 so far this decade, Arthur at 17,500. In our records it goes to boys about 41,700 to 180. Mack never needed a formal version to shorten; it is the short form, standing alone, one syllable of pure friendliness with a century of work behind it.
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Mack peaked in the 1890s and the 2020s in nearly equal measure.
See popularity in Brazil
Popularity in Brazil
161 people · the #29,622 first name in Brazil · about 1 in 1,000,000 · median age 29
Among people named Mack living in Brazil at the 2022 census, more were born in the 1990s than in any other decade.
Source: IBGE, Censo Demográfico 2022
When you meet Mack
People given the name Mack in the United States span the generations: the middle half were born anywhere from 1950 to 2019. Age is the one thing the name won't tell you.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Mack deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Mack truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Mack fits with your family’s names and surname.
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