Geoffrey Wynton Mandelano Castillion (born 25 May 1991) is a Dutch professional footballer who plays as a striker.
[8] Castillion made his debut for the first team on 20 March 2011, in the 3–2 loss against ADO Den Haag in the Eredivisie.
[20] He made his league debut under manager George Ogăraru on 22 February 2015, in a 3–0 home loss against Târgu Mureş.
[30] Castillion made his league debut in a 3–0 loss against Olbia Calcio 1905 on 14 April as a substitute for Franco Ferrari in the 84th minute.
[32][33] On 11 September 2021, Castillion made his league debut of the 2021–22 Liga 1, coming on as a substitute for Febri Hariyadi in the 70th minute.
[37] Castillion made his International debut in an UEFA European Under-17 Championship qualifying match for the Netherlands U-17 against Albania U-17 on 23 October 2007.
He played for the Dutch U-18 team on 19 November 2008 in a friendly encounter against Belgium U-18, a match which ended in 0–3 loss to the Belgians.
He scored the only goal for the Netherlands U18, in his second appearance on 11 February 2009 against Luxembourg U-18, the match ended in 2–1 loss for the Dutch.