Lauren is a feminine of Laurence — from the Latin laurentum ("of Laurentum," a town named for its laurel trees). The name surged into American popularity after Lauren Bacall (1924-2014) — born Betty Joan Perske — made her 1944 film debut at 19 in To Have and Have Not. A top-25 US baby name from 1989 to 2003, peaking at #9 in 1989. Lauren Hutton (born 1943) — American supermodel and actress; defined late-20th-century natural beauty. Lauren Groff (born 1978) — three-time finalist for the National Book Award. Lauren Boebert (born 1986)** — US Congresswoman from Colorado.
Subject of Howard Hawks's To Have and Have Not (1944).
In Pythagorean numerology the letters of Lauren reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.