Strobe_Red said:
Holstein are a breed of cattle with the famous black and white spotted pattern,
Yes...
Strobe_Red said:
and the word holstein is frequently used to refer to said print.
...I seriously doubt that. Searching online in both English and Japanese just gives endless images of actual cows.
In any case, it's misleading (easily confused for the cattle breed or an actual cow from said breed). And clogs up autocomplete for characters named Holstein.
It's also ambiguous because Holstein is also a real-life surname and place name. That's why all the current Holstein characters have qualifiers.
Updated