The first two cars that I owned back in the ‘60s had names provided by a girl friend at the time. “Old blue” for a well used 1954 ford and “New Blue” for the new 1965 Volvo 122S that took its place. When my 113 arrived in Alabama my mother dubbed it “that black car”, as the dark olive paint is so dark that it sometimes appears to be black. This name went away when my mother passed. Later cars were never named.
The ones that followed were/are generally referred to by the make or the color or the most frequent driver; “the Honda”, “the Toyota”, “Mothers car”, “the white one”, etc. The tree MBs currently in the Alabama garage are usually referred to by their color; “the red one”, “the green one” or “the white one” and the BMW is just the “Beemer.”
“The red one”, a 1972 280SEL 4.5 and the most recent addition to the garage was in fact named “Sadie” by the PO. I haven’t taken up the name.