St. Landry was a seventh century bishop of Paris, founder of the city's first hospital. The name is more familiar in recent years thanks to legendary Dallas Cowboys coach Tom Landry, an association that makes this a sports hero name, as well as a thoroughly masculine one. Landry is also in use for girls in the US. Landry is one of the oldest surnames in France, dating back to the medieval period, and is particularly popular among Cajun-Americans. It has been on the Social Security list since 2010.

Landry is one rising surname name, often after legendary Dallas Cowboys football coach Tom Landry, that is given to boys and girls. But the y ending does give it a feminine sound (as opposed to the more boyish and more popular Landon). Land is a Landry nickname that might work for boys or girls.