The information in 1 Chronicles 4:17-18 has been rearranged so its meaning can be more easily understood. (See: rc://en/ta/man/translate/translate-versebridge)
These are the names of men. (See: rc://en/ta/man/translate/translate-names)
The word “these” refers to Miriam, Shammai, and Ishbah. They were the sons Bithiah bore for her husband Mered.
This is the name of a woman.
The Hebrew text says, “His Judahite wife,” but most versions understand “his” to refer to Mered. This refers to a different wife of Mered, in addition to Bithiah.