These numbers refer to each of the brothers and can be expressed as such. Alternate translation: "the second brother ... the third brother" (See: [[rc://en/ta/man/translate/figs-ellipsis]])
It may be helpful to explain what "likewise" means. Alternate translation: "the third brother married her as his other bothers did, and he also died leaving no children" (See: [[rc://en/ta/man/translate/figs-explicit]])