Next to him; either,
1. After his death, as his successor in the same command. And the like is supposed concerning Jehozabad, 2 Chronicles 17:18. Or rather,
2. Next to him in place and authority; or, at least, in power and the numbers of his host.
Related Commentaries of 2 Chronicles 17:15
2 Chronicles 17:15
15 And nextc to him was Jehohanan the captain, and with him two hundred and fourscore thousand.