Morten Helveg Petersen is a Danish politician who has been serving as a Member of the European Parliament (MEP) since 2014. He is a member of the Danish Social Liberal Party, which is affiliated to the Alliance of Liberals and Democrats for Europe Party, and sits in the Renew Europe group in the European Parliament. He was elected to the European Parliament in 2014 and 2019 and served as member of the Folketing 1998–2009.

Niels Lolk Helveg Petersen was a Danish politician. He was Minister of Foreign Affairs from 1993 to 2000, having previously held the role of Minister for Economic Affairs between 1988 and 1990. He was a Member of the Folketing for the Danish Social Liberal Party from 1966 to 1974, 1977 to 1993, and again from 1994 to 2011.