Although not found in the bible, this name was ascribed by early Christians to the father of the Virgin Mary.  He is generally represented as an old man carrying in a basket two turtle-doves, in allusion to the offering made for the purification of his daughter.  His wife was St. Anne, or St. Anna. (Brewer)

The childhood of Mary, wholly legendary.—Joachim and Anna were both of the race of David.  The abode of the former was Nazareth; the latter passed her early years at Bethlehem.  They lived piously in the sight of God, and faultlessly before man, dividing their substance into three portions, one of which they devoted to the service of the temple, another to the poor, and the third to their own wants... (Smith)

In his own work on the Apocalypse, abbot Joachim of Floris speaks of the second Apocalyptic Beast as being governed by "some great prelate who will be like Simon Magus, and, as it were, universal pontiff throughout the work, and be that very Antichrist of whom St. Paul speaks." (McClintock)