How many married to each other Grandmasters are there?
That is a cool question. I wondered that too. I know Sopiko is an IM and WGM. I don't see a GM title though. I think we should include couples/married couples who are at least IM or WIM.
I know of two couples that are both Grandmasters.
Hikaru Nakamura and Atousa Pourkashiyan
Pia Cramling, and Juan Manuel Bellón López
Evgeny Agrest and Svetlana Agrest
Alexander Alekhine and Grace Alekhine
Mohammed Al-Modiahki and Zhu Chen
Keith Arkell and Susan Arkell
Sergey Arkhipov and Natalia Alekhina
Levon Aronian and Arianne Caoili
Suat Atalık and Ekaterina Atalik
Algirdas Bandza and Rasa Bandzienė
Mateusz Bartel and Marta Bartel
Robert Bellin and Jana Bellin
Juan Manuel Bellón López and Pia Cramping
István Bilek and Edit Bilek
Peter Biyiasas and Ruth Haring
Milko Bobotsov and Antonia Ivanova
Igor Bondarevsky and Valentina Kozlovskaya
Bu Xiangzhi and Huang Qian
Graeme Buckley and Susan Arkell-Salic
Pascal Charbonneau and Irina Krush
Egor Chukaev and Klavdiya Chukaeva
William John Donaldson and Elena Donaldson-Akhmilovskaya
Pavel Eljanov and Olena Dvoretska
Lūcijs Endzelīns and Milda Lauberte
Vladimir Feldman and Irina Berezina
Alexandr Fier and Nino Maisuradze
Bobby Fischer and Miyoko Watai
Glenn Flear and Christine Flear
Ovidiu-Doru Foișor and Cristina Adela Foișor
Robert Fontaine and Kateryna Lahno
Laurent Fressinet and Almira Skripchenko
Daniel Fridman and Anna Zatonskih
Grzegorz Gajewski and Joanna Majdan-Gajewska
Valeriya Gansvind and Sergey Kalinitschew
Petar Genov and Lyubka Genova
Anish Giri and Sopiko Guramishvili
Alexander Grischuk and Natalia Zhukova
Boris Gulko and Anna Akhsharumova
Aidyn Guseinov and Elmira Alieva
Zoltan Gyimesi and Nóra Medvegy
Hichem Hamdouchi and Adina-Maria Hamdouchi
William Hartston and Jana Hartston
Helgi Grétarsson and Lenka Ptáčníková
Sergey Grigoriants and Petra Papp
Gilberto Hernández Guerrero and Claudia Amura
Miguel Illescas and Olga Alexandrova
Alexander Ivanov and Esther Epstein
Artur Jakubiec and Edyta Jakubiec
Paweł Jaracz and Barbara Jaracz
Sriram Jha and Subbaraman Vijayalakshmi
Gawain Jones and Sue Maroroa
Toms Kantans and Anna Kantane
Sergey Karjakin and Kateryna Dolzhykova
Andrei Kharlov and Elena Zaiatz
Jānis Klovāns and Astra Klovāne
Jānis Kļaviņš and Ilga Kļaviņa
Oleg Korneev and Tatiana Kononenko
Yona Kosashvili and Sofia Polgar
Leonid Kritz and Nadezhda Kosintseva
Erwin l'Ami and Alina l'Ami
Bogdan Lalić and Susan Lalic
Gary Lane and Nancy Lane
Vladimir Lazarev and Anda Šafranska
Christopher Lutz and Anke Lutz
Igor Lysyj and Olga Girya
Marat Makarov and Julia Demina
Vadim Malakhatko and Anna Zozulia
Vidmantas Mališauskas and Marina Mališauskienė
Rauf Mamedov and Nataliya Buksa
Robert Markuš and Ana Srebrnič
Reginald Pryce Michell and Edith Michell
Igor Miladinović and Anna-Maria Botsari
Tony Miles and Jana Miles
Sergei Movsesian and Julia Movsesian (formerly with Petra Krupková)
Martin Mrva and Alena Mrvová
Arkadij Naiditsch and Yuliya Shvayger
Jaan Narva and Regina Narva
Nguyễn Ngọc Trường Sơn and Phạm Lê Thảo Nguyên
Peter Heine Nielsen and Viktorija Čmilytė
Srećko Nedeljković and Verica Nedeljković
John Nunn and Petra Fink
Suat Rıza Öney and Gülümser Öney
Arman Pashikian and Maria Kursova
Peng Xiaomin and Qin Kanying
Jovan Petronic and Sanja Petronic
Vasik Rajlich and Iweta Rajlich
Ramachandran Ramesh and Aarthie Ramaswamy
Igors Rausis and Olita Rause
Zoltán Ribli and Maria Grosch
Maxim Rodshtein and Tereza Olsarova
Ian Rogers and Cathy Rogers
Vidrik Rootare and Salme Rootare
Gennadij Sagalchik and Olga Sagalchik
Bjarke Sahl and Sheila Barth Berntsen
Gediminas Sarakauskas and Zivile Sarakauskiene
Yasser Seirawan and Yvette Nagel
Miron Sher and Alla Grinfeld
Alexei Shirov and Viktorija Čmilytė
Alexei Shirov and Olga Dolgova
Alexei Shirov and Anastasia Travkina
Yuri Shulman and Viktorija Ni
Luca Shytaj and Elisabeth Pähtz
Bartosz Soćko and Monika Soćko
Alexey Suetin and Kira Zvorykina
Praveen Thipsay and Bhagyashree Thipsay
Pavel Tregubov and Alexandra Kosteniuk
Paul Truong and Susan Polgar
Maxim Turov and Irina Slavina Turova
Dennis Wagner and Dinara Wagner
Radosław Wojtaszek and Alina Kashlinskaya
Wu Shaobin and Xie Jun
Wu Xibin and Lou Hongyu
Alex Yermolinsky and Camilla Baginskaite
Stanisław Zawadzki and Beata Zawadzka
Zhang Zhong and Li Ruofan
Georg Meier and Inna Agrest
Alexander Grischuk and Kateryna Lagno
Matthieu Cornette and Deimante Daulyte-Cornette
Jan Werle and Iozefina Paulet
Nijat Abasov and Khayala Abdulla
Misratdin Iskandarov and Narmin Kazimova
Twan Burg and Nargiz Umudova
Atousa Pourkashiyan and Hikaru Nakamura
Dragisa Blagojevic and Lidija Blagojevic
Richárd Rapport and Jovana Rapport
Raymond Song and Lei Tingjie