A

• Animal duos‎ (1 C, 26 P)
• Art duos‎ (2 C, 166 P)

B

• Business duos‎ (50 P)

C

• Codependency‎ (1 C, 3 P)
• Couples‎ (9 C, 44 P)
• Criminal duos‎ (6 C, 104 P)

E

• Entertainer duos‎ (7 C, 37 P)

F

• Fictional duos‎ (9 C, 109 P)
• Filmmaking duos‎ (3 C, 77 P)

S

• Saints duos‎ (2 C, 61 P)
• Sibling duos‎ (6 C, 39 P)
• Siskel and Ebert‎ (4 P)
• Sports duos‎ (1 C, 15 P)

T

• Tag team wrestling‎ (5 C, 5 P)
• Twin‎ (4 C, 27 P)
• Twin satellites‎ (17 P)

W

• Writing duos‎ (4 C, 84 P)

• Duo

+

• Buddy system
• Dual messiahs
• Dyad (sociology)
• Supercouple

0–9

• 9am with David & Kim

A

• Ace and Vis
• Aegus and Roscillus
• Amala and Kamala
• Arnold and Bach

B

• Barber and Calverley
• Bigthan and Teresh
• Bosco–Caesar
• Timothy M. Brennan and Robert Ladd
• Butch Cassidy and the Sundance Kid

C

• Disappearance of Sherlyn Cadapan and Karen Empeño
• Cheng brothers
• Codependency
• Conrad Dorso and John the One-Eyed
• Bill Cook and Ron Herzman

D

• Dacer–Corbito double murder case
• Damon and Pythias
• Dunkelgrafen
• Myles and Milo Dunphy

E

• Izzy Einstein and Moe Smith
• Eric and Eric
• Euodia and Syntyche

G

• Biuku Gasa and Eroni Kumana
• Gora Badal

H

• Hannity & Colmes
• Harmodius and Aristogeiton

J

• Anders Jacobsson and Sören Olsson
• Ispahani Arif Jahan
• Jannes and Jambres
• Stanisław Jasiński and Emilia Słodkowska
• Jinx (chimpanzee)

K

• Khnumhotep and Niankhkhnum
• Kimsan Twins

L

• Ladies of Llangollen
• Lewis and Clark
• Little Ephraim Robin John and Ancona Robin John

M

• Madan–Harini
• Liam McCarthy and John D. O'Callaghan
• Charles McMahon and Darwin Judge
• Moncrieff and Hood disappearance
• Murder of Tanya Moore and Tina Rodriguez
• Mund and Maire

P

• Jane and Mary Parminter
• Pat and Vanna
• James Pratt and John Smith

R

• Rosvall and Voutilainen

S

• Sabina Selimovic and Samra Kesinovic
• Sena and Guttika
• Siskel and Ebert
• Socrates and Stephen
• Thomas Stanesby
• Babar and Haris Suleman

T

• Peter Tessem and Paul Knutsen
• Tryphena and Tryphosa
• Twin bridges
• Two witnesses

U

• Uneslaf and Diodur

Y

• Florence Yoch and Lucile Council