Make Lists within a List

Hey! I want to make arraysNames and arraysData be lists of the previous lists. However, I get this error message: Using the generic type 'List' requires 1 type arguments. What should I do to fix it? Thanks in advance!

 public string[] traitNames = { "Happiness", "Respect", "Authority" };
 public float[] traitData = { 1, 1, 3 };
 
 public string[] suppliesNames = { "Food", "Iron", "Gold" };
 public float[] suppliesData = { 3, 2, 1 };
 
 private List[] arraysNames = { traitNames, suppliesNames };
 private List[] arraysData = { traitData, suppliesData };