From Old Norse 'tryggr' meaning 'trusty/reliable,' later used as an English occupational nickname.
Trigger as a given name carries a long shadow from American Western culture, most famously embodied by Roy Rogers' beloved palomino stallion, who was billed as "the Smartest Horse in the Movies" and appeared alongside Rogers from the 1930s through the 1950s. The horse was so celebrated that upon his death in 1965, Rogers had him taxidermied and displayed at the Roy Rogers Museum — a measure of how deeply the animal was embedded in American popular mythology. The name Trigger in this context conveyed speed, loyalty, and an almost magical bond between human and animal, qualities that gave the word a romantic frontier charge.
The word itself derives from Dutch "trekker" (one who pulls), entering English in the seventeenth century as a term for the lever that fires a weapon. As a surname it appears occasionally in English records — primarily as an occupational or nickname surname for someone associated with crossbow or firearm mechanics. The word's gunpowder associations gave it a connotation of decisive action and sudden force that fit naturally into the iconography of the American West, where the ability to draw and fire quickly was culturally fetishized.
As a first name in the twenty-first century, Trigger is rare, unconventional, and unmistakably American in character. It belongs to a family of bold, noun-based names — Ranger, Maverick, Colt, Gauge — favored by parents who want a name with an edge of rugged individualism. Its use today is largely concentrated in rural and Southern communities with connections to equestrian culture, rodeo, or hunting traditions. The name carries obvious conversation-starting power and an unambiguous personality statement: this child will not be overlooked.