Doo almost certainly enters these 28 registry records as a fragment — Scooby-Doo's second syllable, a short-form nickname that got logged independently, or a phonetic term of affection that an owner wrote as a standalone name. As a formal name it has essentially no independent identity outside the Scooby-Doo franchise connection.
The Scooby Connection
Scooby-Doo, the Great Dane from Hanna-Barbera's 1969 animated series, is one of the most recognized animals in television history. The full name Scooby appears in registries far more often; Doo alone suggests an owner who registered only half the name, used it as a nickname, or typed a shorthand that got permanently recorded. Great Danes collect the full Scooby-Doo name with regularity.
Phonetic Affection Terms
Doo, Boo, Moo — single-syllable reduplicated sounds function as generic affection nicknames in many households. They're rarely intended as formal names but appear on registration forms when owners write what they actually call the animal. This is a known registry artifact pattern at the lower ranks.
The Counter-Reading: Not Really a Name
Doo as a standalone name has no narrative, no etymology, no cultural weight beyond the Scooby shorthand. If the Scooby-Doo tribute is the goal, use the full Scooby. Browse pet names for names that function as complete identities.