The 59th Olympiad was in 544 BCE.
Praxidamas was Alkidamas' (the subject of Pindar's 6th Nemean ode) grandfather, cf. Pi. N. 6.15-6. Based on the praises of this family in this ode, it is assumed they were all from Aigina, as Alkidamas (cf. also Paus. 6.18.7). Cf. Farrington (2012), no. 1.12 and p. 103 note 207 for dating: Paus. 6.18.7 tells us that Praxidamas of Aigina won in 544 B.C. in Olympia, and given his other victories were both the 'paides' and 'andres' category (I do not know where Farrington gets this from), Farrington assumes the given date range as a reasonable career span. Pindar mentions at least one Olympic victory - the same one as Pausanias? - as well as 5 Isthmian and 3 Nemean victories, without contest place. Discipline is boxing: that was Alkidamas' family discipline. - PK