Fast food chain Nandos, which originated from South Africa, has pledged to give away free meals to people who share names with the two players, until Anderson is knocked out of the tournament or wins the final.
Anderson will play again in the final on Sunday - hopefully there, a victor will be decided in four sets or less.
Anderson was the 10th most popular surname in WA, according to a 2012 survey.More news: US forces European Union into buying LNG
Isner was serving first, with Anderson then having to hold each time in order to stay alive in the match.
For much of the afternoon on the All England Lawn Tennis Club's centre court - which eventually stretched to an incredible six hours and 35 minutes - proceedings went according to the script.
A showdown between two tennis skyscrapers - with Isner topping the 6 foot 8 Anderson by two inches - predictably featured three tiebreaks and 102 thunderbolt aces but it was the 32-year-old South African who delivered the knockout blow.More news: Putin meeting won't have 'Perry Mason' moment
While the match was tense, it was far from compelling, with both power players simply blasting serves past one another and trading service in the final set.
It was, inevitably, a match of big serves galore, with an 129mph second serve from Isner a highlight, but both offered plenty off the ground too in an engaging five-set encounter.
It was a similar tale in the fourth set where the South African broke for 3-2 only to hand the break straight back.
With a spot in the Wimbledon final on the line, the two power players beat each other to a standstill in a match that stretched nearly seven hours. If he does, Isner will face either Rafael Nadal or Novak Djokovic in the Wimbledon Final.More news: Brit exposed to deadly nerve agent regains consciousness
And another all-time great awaits him on Sunday in either Nadal or Djokovic.