I found that Toki could be for Tucker back before Tucker was Tucker. What is interesting is that Toki is in Doomsday and Toki name is almost exclusively found in Devon.
Alward (son of Toki) | Domesday Book
Alward (son of Toki) | Domesday Book
Places in the Domesday Book associated with the name Alward (son of Toki)
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South Radworthy - Wikipedia, the free encyclopedia
South Radworthy - Wikipedia, the free encyclopedia
South Radworthy is a hamlet in the civil parish of North Molton, in the North Devon District of the county of Devon, England. It is about three miles to the n...
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More Toki's:
https://books.google.com/books?id=JsRCAAAAYAAJ&pg=PA72&lpg=PA72&dq=Alward+son+of+Toki&source=bl&ots=45L-U3C76W&sig=IdrsoonjiOzQ7LqPq2-cOfBctrc&hl=en&sa=X&ved=0CDoQ6AEwBWoVChMI2-ef8On5yAIVRRo-Ch0dmA8m#v=onepage&q=toki&f=false
Alward (son of Toki) | Domesday Book
Alward (son of Toki) | Domesday Book
Places in the Domesday Book associated with the name Alward (son of Toki)
View on opendomesday.orgPreview by Yahoo
South Radworthy - Wikipedia, the free encyclopedia
South Radworthy - Wikipedia, the free encyclopedia
South Radworthy is a hamlet in the civil parish of North Molton, in the North Devon District of the county of Devon, England. It is about three miles to the n...
View on en.wikipedia.orgPreview by Yahoo
More Toki's:
https://books.google.com/books?id=JsRCAAAAYAAJ&pg=PA72&lpg=PA72&dq=Alward+son+of+Toki&source=bl&ots=45L-U3C76W&sig=IdrsoonjiOzQ7LqPq2-cOfBctrc&hl=en&sa=X&ved=0CDoQ6AEwBWoVChMI2-ef8On5yAIVRRo-Ch0dmA8m#v=onepage&q=toki&f=false