My sister got in touch with an aunt I haven't seen in decades who had the goods. Here is my MacGregor connection per her research.
HARMANUS KING--B: 1651 Derbyshire, England. Married Mary. Belonged to Society of Friends (Quakers). 4500 Quakers were imprisoned during the 17th century in England. Many changed their names, the King's among them, their earlier name having been MacGregor. In 1662, Harmanus and Mary fled from Derbyshire to Holland and from there to France, where they lived among the Huguenots. In 1676, they landed in America arriving on a French vessel. In 1686, they settled at Flushing, Long Island. In 1699, they moved to Nottingham Township, Burlington County, NJ. Harmanus died Sept. 1, 1726.
If you happen to be a cousin of mine I'm glad to provide the information down to my own generation. Turns out I knew it fairly well back to about the mid-19th century, but I didn't know that before that my people came to America by way of New Jersey (who would have thought that from a good Tennesse family?!).
Does anyone know anything about this HARMANUS KING (formerly MacGregor) guy? I'm afraid that this is as far as my aunts and uncles were able to take the line, but then again they worked on paper and dug through books to get this far. Now that we have an internet maybe I can pick up the torch :)