Oïhan Guillamoundeguy (born 19 November 2004) is a French professional golfer who plays on the European Tour. He won the 2025 Irish Challenge.
Career Guillamoundeguy was born in Soorts-Hossegor and started playing golf when he was eight years old. His first victory in a professional event came on the Alps Tour, when he won the 2022 Red Sea Little Venice Open by eight shots, while just a 17-year old-amateur. He turned professional in late 2022, and secured a second victory at the 2023 Abruzzo Alps Open, which helped him finish 4th in the Order of Merit and graduate to the 2024 Challenge Tour.
In his second season the Challenge Tour, he won the 2025 Irish Challenge, which helped him finish 5th in the season rankings and graduate to the European Tour for 2026.
Amateur wins 2019 Grand Prix De Pau 2020 Grand Prix De Saint Donat, Grand Prix De Pau
Source:
Professional wins (3) Challenge Tour wins (1) No.DateTournamentWinning scoreMargin ofvictoryRunner-up110 Aug 2025Irish Challenge−11 (71-67-69-70=277)3 strokes Ronan Kleu
Alps Tour wins (2) No.DateTournamentWinning scoreMargin ofvictoryRunner-up127 Feb 2022Red Sea Little Venice Open(as an amateur)−24 (65-64-63=192)8 strokes Jorge Maicas 229 Jul 2023Abruzzo Alps Open−13 (65-66-66=197)1 stroke Davey Porsius
Team appearances Amateur European Young Masters (representing France): 2020 European Boys' Team Championship (representing France): 2021, 2022 Jacques Léglise Trophy (representing the Continent of Europe): 2021 (winners) European Nations Cup – Copa Sotogrande (representing France): 2022
See also 2025 Challenge Tour graduates
References
External links