Herman, the son of Anthony, was married in Christ Church, Philadelphia, February 8, 1711, to Elizabeth Watts, and soon after moved to the region of the Pennypack Creek, in Moreland Township, Montgomery County. From this marriage eight sons were born, of whom the fourth, Herman, born 18 Jan 1721, was the progenitor of the Bucks County or Warminster branch.414

Herman Yerkes emigrated to Pennsylvania with his parents and probably resided with them at Germantown until 1709 when his father purchased a plantation of three hundred acres in the Manor of Moreland, to which estate the family doubtless moved about that time. Subsequently, probably at the time of the marriage of Herman Yerkes, the father gave to his son, Herman, two hundred acres of the Manor of Moreland and formally conveyed to him such portion by deed dated 20 Aug 1723.

Herman Yerkes was a farmer and miller and he conducted his business affairs with such energy, prudence, and success, that he came to possess considerable wealth, in the accumulation of which he was materially assisted by the strong hands of his eight sturdy sons.

He added largely to his landed estate, acquiring in all about eight hundred acres of the best farm land in the Manor of Moreland. In 1744, he formed a partnership with Walter Moore in the milling business and, as partners, they built a water grist mill on the bank of the Pennypack Creek, upon a portion of the plantation of Mr. Yerkes, who set apart nineteen acres of the same for milling purposes. Mr. Yerkes devised his interest in the mill property to his four youngest sons, Silas, Stephen, Elias, and Titus — and the last three named released their interests to their brother, Silas, who conveyed all of his rights to Walter Moore on 4 Jul 1757, the former partner of his father. At a later period, this property was acquired by one ‘Shelmire’ and was long known a “Shelmire’s Mills.”

Herman Yerkes died on his plantation in Moreland, between 2 May 1750, the date of his will, and 4 Mar 1751, the time the will was proved at Philadelphia.413

“Herman Yerkes, son of Anthony and Margaret, born in Holland in 1689, died in Moreland in March, 1751. He was a farmer and miller. He married February 8, 1711, Elizabeth, daughter of Rev. John and Sarah (Eaton) Watts, born April 15, 1689. (Rev. John Watts was a native of Leeds, England, and his wife of Wales). Herman Yerkes probably settled on his father’s plantation in Moreland at its purchase in 1709. His father conveyed to him two hundred acres on Pennypack creek in 1723. In 1744, in conjunction with Walter Moore he erected a mill on Pennypack creek and set apart nineteen acres of land therewith. This mill he devised to his sons, and it later became the property of Jacob and John Shelmire, and is to this day known as “Shelmire’s Mill.””414, pg. 75 from biography of Harman Yerkes

Will dated 2 May 1750; Proved 4 Mar 1751 J.368
Wife: Elizabeth. Children: Anthony, John, Josiah, Herman, Sarah, Elizabeth, Silas, Stephen, Elias, and Titus. Exec: Elizabeth and Silas Yerkes. Witnesses: David Foulton, Elizabeth Brown, Andrew Patterson.395