How to separate a first name and last name in c#?

I am looking for how to get rid off below exception "Index was outside the bounds of the array." for the below case 2

Aim: To separate the first name and last name (last name may be null some times)

Case 1:

Name: John Melwick

I can be able to resolve the first case with my code

Case 2:

Name: Kennedy

In case two I am getting an error Index was out of range at LastName in my code

Case 3:

Name: Rudolph Nick Bother

In case 3, I can be able to get:

FirstName: Rudolph and LastName: Nick (whereas I need Nick Bother together to be lastname)

Very much thankful, if anybody help me.

Here is the code:

Match Names = Regex.Match(item[2], @"(((?<=Name:(\s)))(.{0,60})|((?<=Name:))(.{0,60}))", RegexOptions.IgnoreCase);if (Names.Success){    FirstName = Names.ToString().Trim().Split('')[0];                          LastName = Names.ToString().Trim().Split('')[1];}