Having been puzzling over this line for some time the following picture seems to be emerging. Arthur Gates Auchmuty (AGA) was born in Co Longford in 1710.I have original references from Dublin for this.He married Ann Dickenson, all agree on this.I have had three dates for his death, 1747, 1765 and 1797. The most likely seems to be 1747, whereupon his widow Ann married Enoch Kenyon (see Bill Wright on the Kenyon forum). AGA junior was born to AGA and Ann abt 1738 in R.I. It may be him we know of later in PA.
Samuel; there is said to be a son of AGA snr born 1738. I have now seen photocopies of original pension papers for a Samuel Auchmuty, resident in Augusta Township who says he was born 1752.He was paid a pension till his death in 1834.He enlisted in 1776, served till 1781.His house burned down 1812.No knowledge of wife or issue.So where does he fit into the AGA picture and is it this Samuel who married Ann McMahon in 1775 three year after the birth of their daughter Isabella?