John Gill Commentary Ruth 4:20

"and Amminadab begat Nahshon, and Nahshon begat Salmon," — Ruth 4:20 (ASV)

And Amminadab begat Nahshon
The prince of the tribe of Judah, as the Targum adds; and so he was when the Israelites were come out of Egypt, and were in the wilderness at the time of the dedication of the altar, (Numbers 7:12) called Nahsson, (Matthew 1:4) (Luke 3:32) , and Nahshon begat Salmon; or, as in the Hebrew text, Salmah, and in (1 Chronicles 2:11) , Salma; and yet in the verse following Salmon, as we read it.