This is that Benaiah
Bnayah (ben-aw-yaw')
Jah has built; Benajah, the name of twelve Israelites -- Benaiah.
who was mighty
gibbowr (ghib-bore')
powerful; by implication, warrior, tyrant -- champion, chief, excel, giant, man, mighty (man, one), strong (man), valiant man.
among the thirty
shlowshiym (shel-o-sheem')
thirty; or (ordinal) thirtieth -- thirty, thirtieth.
and above the thirty
shlowshiym (shel-o-sheem')
thirty; or (ordinal) thirtieth -- thirty, thirtieth.
and in his course
machaloqeth (makh-al-o'-keth)
a section (of Levites, people or soldiers) -- company, course, division, portion.
was Ammizabad
`Ammiyzabad (am-mee-zaw-bawd')
people of endowment; Ammizabad, an Israelite -- Ammizabad.
his son
ben (bane)
a son (as a builder of the family name), in the widest sense (of literal and figurative relationship, including grandson, subject, nation, quality or condition, etc.