Donnchadh Ó hAmhsaigh
Donnchadh Ó hAmhsaigh( Donnchadh Ó Hámsaigh), known in English as Denis Hampsey, Denis Hampson or Denis Hempson( 1695 – 5 or 11 November 1807), was an Irish harper.
Filip Arsenijević
Filip Arsenijević( born 2 September 1983) is a Serbian footballer who plays for TSC Bačka Topola.
He is older brother of Nemanja Arsenijević.
Santiago Rivas
Santiago Agustín Rivas( born 18 September 2000) is an Argentine professional footballer who plays as a midfielder for Defensores Unidos.
Denis Sergeev
Denis Sergeyevich Sergeev or Denis Sergeyevich Sergeyev( Денис Сергееви ч Сергеев; born March 21, 1982 in Vladimir Oblast, Russia) is a Russian amateur boxer who won the silver medal at the 2008 European Amateur Boxing Championships in the super heavyweight division.
Dennis Lewiston
Dennis C. Lewiston or Denis Lewiston( May 22, 1934 – June 8, 2014) was a cinematographer and former camera operator with a career spanning the 1960s through the 1990s.
He has worked mostly on American television movies.
He occasionally worked as a film director or screenwriter.
Denis Silva
Denis Silva Cruz( born 28 December 1985), commonly known as Denis Silva or Denis is a Brazilian professional footballer who plays as a defender for Keshla in the Azerbaijan Premier League.
Denis O'Gorman
Denis O'Gorman( 28 August 1914 – 1 May 2005) was an Irish hurler who played as a left corner- back and as a goalkeeper for the Tipperary senior team.
O'Gorman made his first appearance for the team during the 1934 championship and was a regular player over the course of the next decade.
During that time he won one All- Ireland winners' medal and two Munster winner's medals.
At club level, he enjoyed a lengthy career with Holycross- Ballycahill, however, a county club championship winners' medals eluded him.
O' Gorman also won four Railway Cup winners' medals with Munster.
Denis Ezhov
Denis Ezhov or Denis Yezhov( born February 28, 1985) is a Russian professional ice hockey player who currently plays for Gyergyói HK of the Erste Liga.
Ezhov was selected by the Buffalo Sabres in the 4th round( 114th overall) of the 2003 NHL Entry Draft.
Yezhov competed in the 2003 World Junior Ice Hockey Championships where he won a gold medal as a member of Team Russia.
Denis O'Gorman (athlete)
Denis O'Gorman( 22 May 1928 – 2011) was a British long- distance runner.
He competed in the marathon at the 1960 Summer Olympics.
Jovan Markovski
Jovan Markovski( born March 28, 1988) is a Macedonian professional basketball small forward who last played for Vardar.
He is older brother of Gorjan Markovski who is also basketball player and plays for Feni Industries

Question: Who is older, Denis O'Gorman or Santiago Rivas?
Answer: Denis O'Gorman