Question: I am trying to match the characters at the end of line that contains digits and spaces. For example

62 29N 23W 5 WATSON B

I'd like to match "WATSON B"

but also match "SMITH" in the case of 

60 29N 22W 7 SMITH

Answer: 
This simple regex should do it:

```
([A-Z]+ *)+$

```

See [live demo](http://rubular.com/r/E8X6Z93tZt).
This one should do it: `[a-zA-Z][a-zA-Z\s]+$`

Made an edit. Initial regex caught space char before name.