Forum:Armando Dippet's age

Can someone please tell me where in canon it states that Armando Dippet was born in the 1600. According to his article he would have been over 300 years old at the time of his death. Since there are only two ways that are known of in the wizarding world to achieve this type of longevity (i.e. Horcruxes, Elixer of Life) and it appears that Professor Dippet was neither a dark wizard nor an alchemist, nor even a close colleague of Nicholas Flammel, how did he live so long? I know wizards live long lives, but this does seem a bit off without some extra-magical assistance. Could someone please clarify? Thanks