The Knowledge page 34

7 across ‘Jesus’ grandfather, Biblical father of Mary’ for our answer JOACHIM. According to the Catholic, Orthodox and Anglican traditions, Joachim was the husband of Saint Anne and the father of Mary, the mother of Jesus.  The story of Joachim and Anne first appears in the Gospel of James, but Joachim and Anne are not mentioned in the Bible.

Thanks to Ann Coventry, Greytown NZ for pointing out this error.