Regular Expression (first character matching a-z)

I think this would also work

^[a-zA-Z].*

If you wanted to test just the first character as being alphabetical and the rest of the string can be anything.

Try something like this:

^[a-zA-Z][a-zA-Z0-9.,$;]+$

Explanation:

^                Start of line/string.
[a-zA-Z]         Character is in a-z or A-Z.
[a-zA-Z0-9.,$;]  Alphanumeric or `.` or `,` or `$` or `;`.
+                One or more of the previous token (change to * for zero or more).
$                End of line/string.