“So you would argue that goyim named Sidney, Seymour, Morris or Debbie have a Jewish name?”
Either yes they have Jewish names.
Or they takeh don’t have Jewish names but they are a minority and whether a name is “jewish” or not is determined by the majority.
Ketzas rayah to my lishna Kaman is Esther is obviously an inherentmy Jewish name. Aye there are goyim named esther (It’s a popikar carribean name) lechoyra those goyim have s Jewish name.