SON OF

IN ENGLAND RICHARDSON MENT SON OF RICHARD. JOHNSON, SON OF JOHN.

IN SCOTLAND "MAC" MENT SON OF. SO WE HAVE HAVE MAC DONALD, SON OF DONALD.

MACGREGOR, SON OF GREGOR.

IN WALES "AP" MEANS SON OF.

SO WE HAVE AP HOWELL SON OF HOWELL.

AP DAFYDD BECAME SON OF DAVID.

IN IRELAND "MC" MENT SON OF. O'QUINN WOULD BE SON F QUINN. 

THESE NAMES CALLED PATRONYMIC SURNAMES.