What does Jeremiah 40:7 mean?

Ishmael son of Nethaniah, Johanan son of Kareah, Seraiah son of Tanhumeth, and their men came to Gedaliah at Mizpah. Jeremiah 40:7 - Modern Text Bible

(Several leaders, including Ishmael and Johanan, come to Mizpah to meet with Gedaliah.)