| Iván Guillauma | |
| Fullname: | Iván Marcos Guillauma Modernell |
| Birth Date: | 20 September 1977 |
| Birth Place: | San José de Mayo, Uruguay |
| Height: | 1.70 m |
| Position: | Midfielder |
| Years1: | 1998–2001 |
| Years2: | 2002–2004 |
| Caps2: | 18 |
| Goals2: | 1 |
| Years3: | 2005–2007 |
| Clubs3: | Cobresal |
| Caps3: | 101 |
| Goals3: | 7 |
| Years4: | 2008 |
| Clubs4: | Cobreloa |
| Caps4: | 31 |
| Goals4: | 3 |
| Years5: | 2009 |
| Clubs5: | Santiago Morning |
| Caps5: | 13 |
| Goals5: | 1 |
| Years6: | 2009 |
| Clubs6: | Cobresal |
| Caps6: | 13 |
| Goals6: | 2 |
| Years7: | 2010 |
| Clubs7: | Deportes Iquique |
| Caps7: | 10 |
| Goals7: | 2 |
| Years8: | 2011 |
| Caps8: | 18 |
| Goals8: | 1 |
| Years9: | 2012 |
| Clubs9: | Trasandino Socoroma |
| Caps9: | – |
| Goals9: | – |
Iván Marcos Guillauma Modernell (born September 20, 1977) is an Uruguayan former footballer.
Born in San José de Mayo, Guillauma spent most of his football career playing in Chile. He had spells with Cobresal and Cobreloa.[1] In 2008, Cobreloa manager Marco Antonio Figueroa and Guillauma had a conflict, resulting in Guillauma leaving the club.[2]
He ended his career playing for Chilean club Trasandino de Socoroma after San Marcos de Arica.[3]