A Jezreelite was a native or inhabitant of Jezreel. Naboth is specifically called a Jezreelite in the account of Ahab and the vineyard.
Definition
A Jezreelite was a native or inhabitant of Jezreel. The designation is specifically applied to Naboth in the account of his vineyard and Ahab’s actions.
Biblical Usage
Naboth is called a Jezreelite in 1 Kings 21 and the related passages concerning Ahab’s desire for his vineyard.
Historical Bible Dictionaries
International Standard Bible Encyclopedia (ISBE)
<p>jez'-re-el-it, jez'-rel-it ha-yizre`e'li): applied to Naboth, a native of Jezreel (1) (1Ki 21:1, etc.).</p>