[NBA] 很不理解，凯尔特人为什么要叫凯尔特人？？？

柯林斯高级辞典第五版

Celt|ic /k'eltɪk, s'el-/
[ADJ] usu ADJ n
If you describe something as Celtic, you mean that it is connected with the people and the culture of Scotland, Wales, Ireland, and some other areas such as Brittany.