[ANSTHRLD] Irish name

[Lynda Boots]

I have a client who wants the name Jason Drysdale, for the late 13th century, 
 an Irish  conscript in the English army.  Good news, I haven't found a 
name conflict.  Bad news, I haven't found support for the name. 
 
My assumption is that this would be an Anglicized Irish name.  Drysdale seems to 
be Scottish.  Jason doesn't appear in any of the Anglicized name rolls I've 
found.
 
Anyone able to help this gentle?
 
Dreda