Wrangler - Jeep Wrangler
Wrangler was the updated name Jeep gave the CJ-model which had been around since 1944, built by Willys, Kaiser, and AMC over the years.
Here's the specific model-year runs, and the 2-letter code Jeep uses for them:
1987-1996 = YJ Wrangler
1997-2006 = TJ Wrangler (and LJ Unlimited)
2007-2018 = JK Wrangler (and JK Unlimited)
2018+ + JL Wrangler (and JL Unlimited)