Douglas at rank 1410 closes this batch as another full-formal-name deployment on a dog. Douglas has a specific quality among the formal names: it sounds like it belongs to someone older, someone with gravitas, someone who has strong opinions about coffee. On a dog, that energy is usually deployed affectionately and with some awareness of the comedy.
The Scottish Root
Douglas comes from the Scottish Gaelic Dubhghlas, meaning dark stream, from dubh (dark/black) and glas (stream). It was originally a clan name before becoming a given name. The dark-stream etymology fits large, dark-coated dogs particularly well. Black Labs and Scottish Terriers carry both the etymology and the name's gravitas with physical coherence.
The Doug Shorthand
Douglas on the paperwork, Doug in the dog park: the standard configuration. Doug is one of the most reliably friendly single-syllable names in English. Basset Hounds are particularly strong Douglas carriers. The human name is documented at /names/douglas.
The Counter-Reading
Douglas has such specific mid-century energy that it reads as a comedic statement on a young dog in a young household. For owners who want formal-gravitas comedy without the demographic specificity, Barnaby offers similar theater.