Elizabeth was a distant cousin of Mary, the mother of Jesus.  She was a descendant of Aaron's daughters.  Gabriel first appeared to Elizabeth to announce her pregnancy.  Mary visited her while pregnant.  Elizabeth believed that Jesus would become the Messiah.  She received a visit from Jesus when he and his son were 5 years old.  She kept John informed about world affairs.  Her husband Zacharias died in July of the year 12.  She died on August 17, 22 AD. 
See also: UB 135:0-4.