The term "son" is used in Scripture language to imply almost any kind of descent or succession, as ben shanah, "son of a year," i.e. a year old; ben kesheth, "son of a bow," i.e. an arrow. The word bar is often found in the New Testament in composition, as Bar-timaeus.
SON
Meaning of SON in English
Smith's Bible English dictionary. Английский библейский словарь Смита. 2012