In White Pigeons three brothers try to prove that the Ainu of Hokkaido Island in Northern Japan are of Celtic origin -- not an easy task, they struggle through it. If, however, I had only known at the time that the Irish also confuse 'r's for 'l's and 'l's for 'r's it would not have been such an arduous task.
For example: Molly is an Irish derivative of Mary. Maureen is too, but think about the extra effort it takes to say Maureen, like they needed to stretch the first syllable out as long as they could to prepare them for the correct literation. The best of these transliterations happened when the Scots made glamour out of grammar!