I didn’t know what a widows peak was so I googled it and figured out that’s just what you call that type of hairline in english.
Personally I really like the german word for it which is “Geheimratsecken”. It literally translates to “secret council corners”.
Same. I still use the original Proteus Core labeled version. They have since re-released the mouse 3 times I think but my original is still going strong