She became pregnant
"Judah's wife became pregnant"
He was named Er
This can be written in active form. AT: "His father named him Er" (See: rc://en/ta/man/translate/figs-activepassive)
Er ... Onan ... Shelah
These are the names of Judah's sons. (See: rc://en/ta/man/translate/translate-names)
called his name
This is the name of a place. (See: rc://en/ta/man/translate/translate-names)