Lansdowne Lady San Toi
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 Lady Doe |  Knoydart Robin Hood | Hamilton Jack | Victor (Wildair x Nellie) | Wildair | Whitman's Doctor | Unknown |
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| Waddell's Josie |  Finlay's Dan (Findley's Dan) | |||||
| Hubbell's Belle | ||||||
| Nellie (Doctor x Josie) | Whitman's Doctor | Unknown | ||||
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| Waddell's Josie | Finlay's Dan (Findley's Dan) | |||||
| Hubbell's Belle | ||||||
| Hamilton Jet | Little Red Rover |  Obo IIWebsite : http://www.asc-cockerspaniel.org/history/histoobo.asp | Farrow's Obo | |||
| Pitchers Chloe II | ||||||
| Woodstock Dinah | Kelly's Tippoo | |||||
| Toronto Jet | ||||||
| Spunkey (Wilkes Obo x Black Flash) | Wilkes Obo | Obo II Website : http://www.asc-cockerspaniel.org/history/histoobo.asp | ||||
| Darkie I (Beau x Blackie) | ||||||
| Black Flash (Obo II x Critic) | Obo II Website : http://www.asc-cockerspaniel.org/history/histoobo.asp | |||||
| Critic (Watermark x Blackie II) | ||||||
| Red Myrtle | Red Mack | Hamilton Red Leo | Red Roland | Brantford Red Jacket | ||
| Pearl (Hector x Black Meg) | ||||||
| Mona (Red Jacket x Ula) | Brantford Red Jacket | |||||
| Ula (Brant x Busy) | ||||||
| Jessie (Bronte x Topsey W) | Bronte | Brant (Sir Obo) | ||||
 Mollie Brant | ||||||
| Topsey W | Brock | |||||
| Black Bess (Raven x Busy) | ||||||
| Miss Scottie | Red Doc | Doc | Young Obo | |||
| Rose Obo | ||||||
| Hazel Obo | Obo II Website : http://www.asc-cockerspaniel.org/history/histoobo.asp | |||||
| Althea | ||||||
| Inez | Hamilton Red Leo | Red Roland | ||||
| Mona (Red Jacket x Ula) | ||||||
| Linconlm Lassie | Black Duke | |||||
| Daisy (Bronte x Fannie) | ||||||
| Nora (Paddie x Kelpie) | Unknown | Unknown | Unknown | Unknown | Unknown | |
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| Kelpie (Peko x Rose Palmer) | Peko (Roy Obo x Cleo) | Roy Obo | Obo II Website : http://www.asc-cockerspaniel.org/history/histoobo.asp | Farrow's Obo | ||
| Pitchers Chloe II | ||||||
| Hiawatha Belle | Black Pete | |||||
| Bessie C | ||||||
| Cleo (Hector x Black Meg) | Hector | Obo II Website : http://www.asc-cockerspaniel.org/history/histoobo.asp | ||||
| Woodstock Flirt | ||||||
| Black Meg (Beau x Black Bess II) | Pitchers Beau | |||||
| Easten's Black Bess II | ||||||
| Rose Palmer | Black Pete | Obo Jr | Farrow's Obo | |||
| Farrow's Nellie | ||||||
| Phonsie | Obo II Website : http://www.asc-cockerspaniel.org/history/histoobo.asp | |||||
| Blackie III (Watermark x Blackie II) | ||||||
| Phyllis (Obo II x Darkie) | Obo II Website : http://www.asc-cockerspaniel.org/history/histoobo.asp | Farrow's Obo | ||||
| Pitchers Chloe II | ||||||
| Darkie I (Beau x Blackie) | Easten's Beau | |||||
| Easten's Blackie | ||||||