| Otgonbold Baatarkhuyag | M |  | MGL | | 20.12.1996 |
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| Samuel Barata | M | | POR | | 19.06.1993 |
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| Paula Barcelo Martin | F | | ESP | | 13.03.1996 |
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| Pauline Basquin | F | | FRA | | |
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| Khulan Batkhuyag | F | | MGL | | 20.11.1999 |
| Manika Batra | F | | IND | | 15.06.1995 |
| Isobel Batt-Doyle | F | | AUS | | 14.09.1995 |
| Sugar Katinka Battai | F | | HUN | | 17.04.2003 |
| Haley Batten | F | | USA | | 19.09.1998 |
| Michela Battiston | F | | ITA | | 15.09.1997 |
| Nadia Battocletti | F | | ITA | | 12.04.2000 |
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| Nicolas Batum | M | | FRA | | 14.12.1988 |
| Simon Batz | M | | GER | | 01.12.2002 |
| Erdenebayar Batzaya | M | | MGL | | 05.03.2000 |
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| Katharina Bauer | F | | GER | | 01.09.1995 |
| Sarah Baum | F | | RSA | | 26.01.1994 |
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| Steve Baur | M | | CAN | | |
| Alba Bautista | F | | ESP | | 13.07.2002 |
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| Christopher Baxter | M | | RSA | | 22.02.2000 |
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| Leonie Antonia Beck | F | | GER | | 27.05.1997 |
| Sophie Becker | F | | IRL | | 16.05.1997 |
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| Daniel Bell | M | | RSA | | 28.09.1994 |
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| Joe Zen Robert Bell | M | | NZL | | 27.04.1999 |
| Joshua Bell | M | | AUS | | 20.05.1994 |
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| Orlando Bennett | M | | JAM | | 12.10.1999 |
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| Lukas Bergmann | M | | BRA | | 25.03.2004 |
| Marla Bergmann | F | | GER | | 16.09.2001 |
| Zizou Bergs | M | | BEL | | 03.06.1999 |
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| Susannah Berry | F | | IRL | | 01.01.1996 |
| Daniel Bershadsky | M | | ISR | | |
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| Martina Berta | F | | ITA | | 25.03.1998 |
| Pietro Bertagnoli | M | | ITA | | 22.08.1999 |
| Widad Bertal | F | | MAR | | 31.08.1999 |
| Victoire Berteau | F | | FRA | | 16.08.2000 |
| Bob Bertemes | M |  | LUX | | 24.05.1993 |
| Amita Berthier | F |  | SGP | | 15.12.2000 |
| Lou Berthomieu | F | | FRA | | |
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| Toshka Besharah | F | | CAN | | |
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| Jael Bestue | F | | ESP | | 24.09.2000 |
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| Adrien Briffod | M | | SUI | | |
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| Emily Bugeja | F | | CAN | | 30.04.1999 |
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| Klara Gabriele Bühl | F | | GER | | 07.12.2000 |
| Nikolaj Hoffmann Buhl | M | | DEN | | 04.09.1992 |
| Philipp Buhl | M | | GER | | 19.12.1989 |
| Frieda Bühner | F | | GER | | 28.05.2004 |
| Polina Buhrova | F | | UKR | | 30.01.2004 |
| Anne Buijs | F | | NED | | 02.12.1991 |
| Sarah Buis | F | | NED | | 20.03.2000 |
| Santiago Buitrago | M | | COL | | 26.09.1999 |
| Eugenia Bujak | F | | SLO | | 25.06.1989 |
| Vladyslav Bukhov | M | | UKR | | 05.07.2002 |
| Luka Bukić | M | | CRO | | 30.04.1994 |
| Sophie Bukovec | F | | CAN | | 22.09.1995 |
| Konrad Bukowiecki | M | | POL | | 17.03.1997 |
| Mohamed Bukrah | M | | LBY | | 06.07.2003 |
| Dominik Buksak | M | | POL | | |
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| Alyssa Bull | F | | AUS | | 01.12.1995 |
| Grace Jacob Bullen | F | | NOR | | 07.12.1997 |
| Luna Bulmahn | F | | GER | | |
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| Joosje Burg | F | | NED | | 29.07.1997 |
| Adam Burgess | M | | GBR | | 17.07.1992 |
| Alexandra Burghardt | F | | GER | | 28.04.1994 |
| Niesha Burgher | F | | JAM | | 08.08.2002 |
| Max Burgin | M | | GBR | | 20.05.2002 |
| Nicolas Burgos | M | | CHI | | 17.12.2001 |
| Rino Buric | M | | CRO | | 05.04.1997 |
| Abdurauf Buriev | M | | UZB | | 20.07.2002 |
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| Cédric Butti | M | | SUI | | 23.07.1999 |
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| Atheyna Bylon | F |  | PAN | | 06.04.1989 |
| Matthew Byrnes | M | | AUS | | 30.08.2001 |