Iñaki Williams Arthuer (born 15 June 1994) is a professional footballer who plays as a forward for La Liga club Athletic Bilbao and the Ghana national team.

Born in Bilbao, Biscay to Ghanaian parents (who reached Spain by crossing the Sahara on foot and jumping the Melilla border fence),[4][5][3] Williams spent most of his childhood living in Pamplona,[6][7][5] specifically the Rochapea [es] neighbourhood,[8][9] and was playing youth football with local club CD Pamplona when he was spotted by Athletic Bilbao, who signed him to their youth setup at Lezama at the age of 18.

[6] He was immediately called up to the reserves in the Segunda División B and by the end of the same month had played his first match and scored his first goals at that level; he spent the campaign alternating between both squads.

[21] He netted his first goal on 19 February of the following year, starting and contributing to a 2–2 draw at Torino in the UEFA Europa League round of 32,[22] becoming in the process the first black player to score for the club.

[30] In late January 2016, having been scouted by the likes of Arsenal, Liverpool and Manchester City, Williams agreed to an extension of his contract until 2021; the deal included a €50 million buyout clause.

[32] During autumn 2017, Williams scored important late goals in the Europa League against Östersund[33] and Hertha BSC[34] to help his team finish top of the group.

[36] His second, involving a turn and sprint from his own half, touch away from the goalkeeper and precise finish at high speed, was described as "incredible" – it was later awarded as the Marca Golden Goal of the season.

[41][42][3] Late in the same month he started and scored in a 2–0 Basque derby win[43] for his 122nd consecutive Spanish League game, setting a new record by an outfield player in the 21st century ahead of goalkeeper Diego López.

[44] On 24 November, he repeated the feat in a 2–1 away victory against Osasuna, breaking a 31–game undefeated streak of the hosts at their El Sadar Stadium; the occasion also marked his 133rd consecutive appearance in the Spanish top tier, establishing a new club record previously held by Carmelo Cedrún.

[52][5] On 17 April 2022, after starting against Celta, Williams passed the six-year mark since he last missed a league match for the club, and extended his own Spanish top-flight record of consecutive games to 224.

[54][55] In January 2024, having been on international duty at the 2023 Africa Cup of Nations, Williams made the journey back to Bilbao from Abidjan immediately after Ghana's early elimination from the tournament at the group stage was confirmed.

[59] On 24 May 2024, Athletic manager Ernesto Valverde reported that Williams had unknowingly spent the past two years of his footballing career playing with a two-centimetre long shard of glass in his foot.

[66] In 2021, having made no competitive appearances for Spain which would have tied him to his birth nation permanently, he spoke of the possibility of playing for Ghana: "My parents are from Accra and I really enjoy going.