Albert Barnes Commentary 1 Chronicles 26:4

"And Obed-edom had sons: Shemaiah the first-born, Jehozabad the second, Joah the third, and Sacar the fourth, and Nethanel the fifth," — 1 Chronicles 26:4 (ASV)

Obed-edom and Hosah (1 Chronicles 26:10) had been “porters,” or doorkeepers, from the time the ark was brought to Jerusalem (1 Chronicles 15:24; 1 Chronicles 16:38).