Hmmm. SURE!!
'Borong The Warlock' was a Champion in the 1950's.
If you can trace a line back 40+ years to him, then by now, it is very, very diluted and non-existend.
Many BackYardBreeders use the term 'Warlock' simply to mean "big" Doberman.
One that is larger than the DPCA standard allows.
'King' Dobermans are also bred by BYB's to mean extra oversized. Sooo, ask yourself.....
do you want a Doberman or a Great Dane?