| Status | Name | Position | Date Registered | Posts | |
|---|---|---|---|---|---|
| oNasha23 | 2015-07-18 | 0 | |||
| OnayaW | 2017-09-11 | 0 | |||
| Onbow | 2017-09-11 | 0 | |||
| OncaLupe | 2013-07-07 | 0 | |||
| oncasinositenet1 | 2022-05-15 | 0 | |||
| oncasinositenet2 | 2022-05-27 | 0 | |||
| Once-ler | 2018-05-31 | 0 | |||
| onceagain | 2014-04-17 | 0 | |||
| OnceSalvaged | 2018-06-02 | 0 | |||
| OnceUponATime | 2023-11-14 | 0 | |||
| Oncho | 2016-05-22 | 0 | |||
| Oncilan | 2019-07-21 | 0 | |||
| onczao300 | 2014-09-27 | 0 | |||
| OnDea | 2016-09-18 | 0 | |||
| Ondi | 2023-06-30 | 0 | |||
| Ondik | 2014-04-17 | 0 | |||
| Ondoni | 2022-07-19 | 0 | |||
| ondr200 | 2018-09-15 | 0 | |||
| Ondragaming | 2018-07-19 | 0 | |||
| Ondrahrr | 2015-04-15 | 0 | |||
| Ondrej2004 | 2013-12-12 | 0 | |||
| One | 2016-01-16 | 0 | |||
| One bad apple | 2014-01-24 | 0 | |||
| One Kurwa Pony | 2018-06-27 | 0 | |||
| one mechanic | 2015-01-23 | 0 | |||
| One of Nine | 2021-04-04 | 0 | |||
| One simple brony | 2017-10-27 | 0 | |||
| One trick brony | 2016-04-20 | 0 | |||
| One trick brony1 | 2017-11-04 | 0 | |||
| One Trick Pony | 2012-05-24 | 4 | |||