Ms Konul NURULLAYEVA Azerbaijan EC/DA Joined in 2020, left in 2024
Mr Anthony NUTTING United Kingdom Joined in 1952, left in 1954
Ms Mirosława NYKIEL Poland EPP/CD Joined in 2008, left in 2024
Ms Ingela NYLUND WATZ Sweden SOC Joined in 2010, left in 2011
Mr Saidulla NYSHANOV Kyrgyzstan Joined in 2016, left in 2020
Lord Terence M. O’NEILL United Kingdom Joined in 1970, left in 1971
Mr Hendric Dudley OAKSHOTT United Kingdom Joined in 1954, left in 1960
Ms Julia OBERMEIER Germany EPP/CD Joined in 2015, left in 2018
Mr Marcel OBERWEIS Luxembourg EPP/CD Joined in 2014, left in 2015
Ms Jasmina OBRADOVIĆ Serbia EPP/CD Joined in 2016, left in 2021
Ms Marija OBRADOVIĆ Serbia EPP/CD Joined in 2014, left in 2021
Mr Radojko OBRADOVIĆ Serbia EDG Joined in 2012, left in 2014
Mr Jarosław OBREMSKI Poland EC/DA Joined in 2016, left in 2020
Baroness Detta O'CATHAIN United Kingdom Joined in 2009, left in 2009
Ms Judith OEHRI Liechtenstein ALDE Joined in 2013, left in 2017
Ms Gudrún ÖGMUNDSDÓTTIR Iceland Joined in 2005, left in 2007
Mr Edward O'HARA United Kingdom Joined in 1997, left in 2010
Mr Liubov OLEINIK Russian Federation* Joined in 1996, left in 2000
Mr Yury OLEINIKOV Russian Federation* NR Joined in 2019, left in 2022
Mr Francisco OLIVEIRA DIAS Portugal Joined in 1977, left in 1977
Mr Guilherme d' OLIVEIRA MARTINS Portugal Joined in 2005, left in 2006
Ms Barbara OLIWIECKA Poland ALDE Joined in 2024, left in 2025
Ms Kathrine OLLDAG Denmark ALDE Joined in 2019, left in 2022
Baroness Nuala O'LOAN United Kingdom NR Joined in 2015, left in 2016
Ms Fiona O'LOUGHLIN Ireland ALDE Joined in 2020, left in 2025
Mr Paweł OLSZEWSKI Poland EPP/CD Joined in 2012, left in 2014
Mr Pieter OMTZIGT Netherlands EPP/CD Joined in 2004, left in 2025
Ms Altynai OMURBEKOVA Kyrgyzstan Joined in 2016, left in 2019
Mr Abdülkadir Emin ÖNEN Türkiye EC Joined in 2011, left in 2015