Vadim Vlasov
Vadim Nikolayevich Vlasov( born 19 December 1980) is a former Russian football player.
He is a younger brother of Dmitri Vlasov.
Dmitri Varfolomeyev (footballer, born 1978)
Dmitri Nikolayevich Varfolomeyev( born 15 March 1978 in Leningrad) is a former Russian football player.
He is a younger brother of Sergei Varfolomeyev.
Ronald Sinclair
Ronald Sinclair( 21 January 1924 – 22 November 1992), born Richard Arthur Hould and sometimes credited as Ra Hould or Ron Sinclair, was a child actor from New Zealand, turned film editor.
Roman Smishko
Roman Smishko is a retired Ukrainian professional footballer who played as a goalkeeper.
He is a younger brother of Ukrainian defender Bohdan Smishko.
Anton Shunto
Anton Shunto( born 31 May 1988) is a Belarusian professional footballer.
As of 2019, he plays for Molodechno.
He is a younger brother of Denis Shunto, who is a founder and former president of Krumkachy Minsk.
Birgit Pörner
Birgit Pörner( born 20 March 1955) is a German volleyball player.
She competed in the women's tournament at the 1972 Summer Olympics.
Markus Weissenberger
Markus Weissenberger( born March 8, 1975) is an Austrian former footballer who played as a midfielder.
He is a younger brother of former Austria international player Thomas Weissenberger.
Ron Guthrey
Albert Ronald Guthrey( 15 January 1916 – 8 September 2008) was a councillor for Christchurch City Council for 22 years before being elected Mayor of Christchurch.
He was a World War II veteran and he and his family were( and still are) well known business operators in Christchurch.
Alan Chipp
Alan Chipp( born 9 January 1937) is a former Australian rules footballer who played for the Fitzroy Football Club in the Victorian Football League( VFL).
He is a younger brother of politician Don Chipp.
Miloš Zličić
Miloš Zličić( born 29 December 1999) is a Serbian football forward.
He is a younger brother of Lazar Zličić.

Question: Who is younger, Ron Guthrey or Birgit Pörner?
Answer: Birgit Pörner