In 1691 in County Tyrone in Northern Ireland, Robert McConaughy (1691-1758) and his future wife Elizabeth Dinsmore (1691-1788)  were both born of Scottish heritage. They married and had three sons (David 1716, Robert Jr. 1720 and Samuel 1723.) They left Ireland and came to Chester, Pennsylvania in 1733. 

In 1737 he traded his horse for 500 acres in Menallen Township (later York, County)  PA and sometime in 1737 his fourth son John McConaughy was born. Son David served in the general assembly and was appointed sheriff of York County by King George III.

The tax reports of 1762 showed John McConaughy tax bill of 0 pounds, seven shillings and six pence. Other historical records list John McConaughy as Supervisor of Highways in Menallen Twp. in 1772.

York County historical records:
  Administrative Bonds, York Co. Court House. Estate of Robert McConaughy December 5, 1758. Elizabeth his wife and John McConaughy, Administrators.

  Taxables of 1762. John McConaughy, Menallen Twp, Tax = no pounds, seven shillings and six pence

  Civil Officers. John McConaughy, Supv of Highways, Menallen Twp. 1772

Adams County Historical Society:
 The elder Robert McConaughy took out a warrant for 200 acres of land "including his dwelling place" in 1753. This warrant was used by John McConaughy in right of his father to have a survey made in 1766. This tract was called Stony Rubn

More info from the internet

Robert McConaughy (1691--1758) married Elizabeth Densmore (1691--1788) He emigrated from Northern Ireland about 1737; landed at Chester, Delaware; rode to Conowago Creek, & traded his horse for a farm of 500 acres in what is now Menallen Township, Adams Co., PA, but was from 1749 to 1800 in York County. This farm continued to be the family home until the death of his son David (1716--1815). Both Robert and Elizabeth (Densmore) McConaughy are buried in Evergreen Cemetery, Gettysburg, PA. They had a number of Children, among them these three sons: Donald" (there is a debate about this) "...David..., and Samuel..."
"David (1716--1815) married Margaret Ramsey. David was born in Northern Ireland; was Collector of Excise in 1754 for York Co., PA; Sheriff of York County 1767--1768 by commission from George III. Was a member of the York County Committee of Safety during the Revolution, &/or the Colonial Legislature for 6 years after the War. Was also a farmer, miller, and holder of many local & state offices. He & his wife are buried in marked graves in Marsh Creek Churchyard. They had 8 children: Robert...Margaret...Elizabeth...Ann...Martha....Jane...Sarah...David."

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McConaughy Coat of Arms

Origin Displayed: Scottish

Spelling variations include: Robertson, MacConachie, MacConaghy, MacConchie, MacConckey, MacConkey, MacDonnachie, MacDonachie, MacDunnachie, MacInroy, MacLagan, Mac Raibeirt (Gaelic) and many more.

First found in Perthshire where they were seated from early times and their first records appeared on the early census rolls taken by the early Kings of Scotland to determine the rate of taxation of their subjects.

Some of the first settlers of this name or some of its variants were: Daniel Robertson, who settled in Virginia in 1716; along with Francis, Isabella, James, John, and Donald; Alexander, Archibald, Charles, Daniel, Duncan, George, Henry, James, Jane, John, Robert, Thomas and William Robertston all arrived in Philadelphia between 1800 and 1870.

(Above is a small excerpt from our 1800 word history)
Motto Translated: Glory is the reward of valour.