Hymne d'O is the daughter of Nostalgie des Vaux, a mare from a highly promising dam line. Her sire, Gentleman Platière, had already built up an impressive competition record at a young age in France.
Hymne herself was selected for the Elite Auction in Fontainebleau at the age of three. In September 2010, she was sold through this auction to Poland, where she went on to claim bronze at the 2012 Championship for five-year-old horses.
By June 2013, at just six years old, she was already jumping clear rounds at 1.30m level.
Later, Hymne competed in Italy up to 1.55m level.
| Bentley van de Heffinck | Upsilon van de Heffinck | Clinton |
| Ovanna van de Heffinck | ||
| Souvenir van de Heffinck | Heartbreaker | |
| Kinette van de Heffinck | ||
| Nostalgie des Vaux | Gentleman Platière | Jalisco B |
| Sofia Platière | ||
| Raissa des Vaux | Grand Veneur | |
| Hunebelle A |
2012
3rd place – Polish Championship for 5-year-old horses
2013
5th place – Polish Championship for 6-year-old horses
2nd place – CSIYH1* Zagare (1.25m)
2× 5th place – CSIYH1* Zagare (1.25–1.30m)
6th place – CSIYH1* Tallinn (1.25m)
9th place – CSIYH1* Tallinn (1.30m)
2014
1st place – Polish Championship for 7-year-old horses
6th place – CSIYH1* Linz-Ebelsberg (1.25m)
6th place – CSIO3* Odense (1.35m)
10th place – CSIO3* Odense (1.35m)
2015
1st place – CSI2* Opglabbeek (1.35m)
7th place – CSI3* Lier (1.35m)
9th place – CSI2* Opglabbeek (1.30m)
2016
2× 2nd place – CSI1* Valkenswaard (1.40m)
7th place – CSI1* Valkenswaard (1.35m)
2017
2nd place – CSI1* Bonheiden (1.50m)
1st place – CSI1* Sharjah (1.30m)
3rd place – CSI2* Sharjah (1.35m)
4th place – CSI1* Sharjah (1.35m)
9th place – CSI2* Ascona (1.30m)
10th place – CSI2* Ascona (1.35m)
10th place – CSI2* Geesteren (1.30m)
2018
2nd place – CSI2* Cervia (1.40m)
8th place – CSI2* Gorla Minore (1.45m)
9th place – CSI2* Cervia (1.45m)
9th place – CSI2* Oliva (1.45m)
