Tikehau or Porutu-kai is a coral atoll in the Palliser Islands group, part of the Tuamotu Archipelago in French Polynesia. It is included in the commune of Rangiroa. The first recorded European to arrive to Tikehau was the Russian mariner Otto von Kotzebue. He called this atoll Krusenstern Island, after Russian explorer Adam Johann von Krusen…Tikehau or Porutu-kai is a coral atoll in the Palliser Islands group, part of the Tuamotu Archipelago in French Polynesia. It is included in the commune of Rangiroa. The first recorded European to arrive to Tikehau was the Russian mariner Otto von Kotzebue. He called this atoll Krusenstern Island, after Russian explorer Adam Johann von Krusenstern. The Wilkes Expedition passed by this atoll on 9 September 1839.