Princess Onetto
Princess Onetto Hamilton Jack |  Victor (Wildair x Nellie) | Wildair | Whitman's Doctor |
| Waddell's Josie | |||
| Nellie (Doctor x Josie) | Whitman's Doctor | ||
| Waddell's Josie | |||
| Hamilton Jet | Little Red Rover |  Obo IIWebsite : http://www.asc-cockerspaniel.org/history/histoobo.asp | |
| Woodstock Dinah | |||
| Spunkey (Wilkes Obo x Black Flash) | Wilkes Obo | ||
| Black Flash (Obo II x Critic) | |||
| Heatherbloom | Crowe | King Raven | Black Duke |
| Topsy S (Searles' Topsy) | |||
| Malcolmson's Busy | Unknown | ||
| Unknown | |||
| Black Bess (Black Duke x Topsy S) | Black Duke | Obo II Website : http://www.asc-cockerspaniel.org/history/histoobo.asp | |
| Woodland Queen | |||
| Topsy S (Searles' Topsy) | Black Graf | ||
| Chien (Chein) (Hector x Black Meg) | |||