| Hybrid Hostas | Pod Parent | x Pollen Parent | Source | Registered |
| 'Holar Arches Park' | 'Arch Duke' | 'Jurassic Park' possibly | Van Keer, Ronny | --NR-- |
| 'Holar Banana Moon' | 'Harry van de Laar' | Unknown | Van Keer, Ronny | --NR-- |
| 'Holar Black Swan' | 'One Man's Treasure' | 'Red Neck Heaven' | Van Keer, Ronny | --NR-- |
| 'Holar Crimson Grape' | 'One Man's Treasure' | 'Harry van de Laar' | Van Keer, Ronny | --NR-- |
| 'Holar Dragon Rider' | 'Mr Blue' | 'Arch Duke' | Van Keer, Ronny | --NR-- |
| 'Holar Early Days' | 'Tequila Sunrise' | Unknown | Van Keer, Ronny | --NR-- |
| 'Holar Fire Rainbow' | Complex Cross | 'Mr Blue' | Van Keer, Ronny | --NR-- |
| 'Holar Flying Saucer' | 'Riptide' | 'Arch Duke' | Van Keer, Ronny | --NR-- |
| 'Holar Garnet Crow' | 'Tequila Sunrise' | 'Maya Kingsnake' | Van Keer, Ronny | --NR-- |
| 'Holar Glacier Walk' | 'Mikawa-no-Yuki' | 'Mr Blue' | Van Keer, Ronny | --NR-- |
| 'Holar Great Wall' | 'Empress Wu' | 'Mikawa-no-yuki' | Van Keer, Ronny | --NR-- |
| 'Holar High Waves' | 'Arch Duke' | Unknown | Van Keer, Ronny | --NR-- |
| 'Holar Ice Empress' | 'Empress Wu' | 'Mr Blue' | Van Keer, Ronny | --NR-- |
| 'Holar Laser Beam' | 'Miss Linda Smith' | 'Tequila Sunrise' | Van Keer, Ronny | --NR-- |
| 'Holar Microstrip' | 'Riptide' | 'Smokey' | Van Keer, Ronny | --NR-- |
| 'Holar Mystic Girl' | 'Holar Mystic Purple' | 'China Girl' | Van Keer, Ronny | --NR-- |
| 'Holar Mystic Purple' | 'Purple Haze' | Unknown | Van Keer, Ronny | --NR-- |
| 'Holar Purple Flash' | 'Purple Haze' | 'Riptide' | Van Keer, Ronny | --NR-- |
| 'Holar Purple Glacier' | 'Miss Linda Smith' | 'Mr Blue' | Van Keer, Ronny | --NR-- |
| 'Holar Purple Highness' | 'Tequila Sunrise' | 'Mr Blue' | Van Keer, Ronny | --NR-- |
| 'Holar Rainbow Colors' | 'Justice' | 'Arch Duke' | Van Keer, Ronny | --NR-- |
| 'Holar Rainbow Dance' | 'Valley's Top' | 'Sky Dancer' | Van Keer, Ronny | --NR-- |
| 'Holar Rainbow Glow' | 'Justice' | 'Holar Great Wall' | Van Keer, Ronny | --NR-- |
| 'Holar Rainbow Magic' | 'Maya Kingsnake' | 'Greased Pole' seedling | Van Keer, Ronny | --NR-- |
| 'Holar Rainbow Red' | 'Smokey' | 'Maya Kingsnake' | Van Keer, Ronny | --NR-- |
| 'Holar Rainbow Rider' | 'Holar Rainbow Colors' | 'Mr Blue' | Van Keer, Ronny | --NR-- |
| 'Holar Rainbow River' | 'Justice' | 'Green Dragonet' | Van Keer, Ronny | --NR-- |
| 'Holar Rainbow Spearhead' | 'Justice' | Unknown | Van Keer, Ronny | --NR-- |
| 'Holar Rainbow Springs' | 'Justice' | Unknown | Van Keer, Ronny | --NR-- |
| 'Holar Rainbow Storm' | Complex Cross | Unknown | Van Keer, Ronny | --NR-- |
| 'Holar Red Halo' | 'Smokey' | 'Maya Kingsnake' | Van Keer, Ronny | --NR-- |
| 'Holar Red Sea Shell' | 'Marilyn Monroe' | 'Maya Kingsnake' | Van Keer, Ronny | --NR-- |
| 'Holar Red Spear' | 'Maya Kingsnake' | 'Red Imp' | Van Keer, Ronny | --NR-- |
| 'Holar Red Wine' | 'Harry van de Laar' | 'Katsuragawa Beni' | Van Keer, Ronny | --NR-- |
| 'Holar Rising Flame' | 'Tequila Sunrise' | 'Mr Blue' | Van Keer, Ronny | --NR-- |
| 'Holar Smoky Water' | 'Riptide' | 'Tequila Sunrise' | Van Keer, Ronny | --NR-- |
| 'Holar Snake Valley' | 'Valley's Top' | 'Maya Kingsnake' | Van Keer, Ronny | --NR-- |
| 'Holar Sunset Cobra' | 'Tequila Sunrise' | 'Maya Kingsnake' | Van Keer, Ronny | --NR-- |
| 'Holar Sunset Python' | 'Tequila Sunrise' | 'Maya Kingsnake' | Van Keer, Ronny | --NR-- |
| 'Holar White Satin' | 'Uncle Albert' | 'Gretchen's Grace' | Van Keer, Ronny | --NR-- |
| 'Holar Wild Side' | 'Neptune' | 'Tequila Sunrise' | Van Keer, Ronny | --NR-- |
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