Sackett's Land (1974)

Son of a feared fighting man, Barnabas Sackett inherited his father's fiery temper, sense of justice and warrior skills. Declared an outlaw in his native England, Barnabas set his daring sights on the opportunities of the New World. The ruthless piracy of the open seas and the unknown dangers of the savage American wilderness lay before him. And so did the thrill of discovery and the chance to establish a bold new future if he survived.
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From the Back"
After discovering six gold Roman coins buried in the mud of the Devil's Dyke, Barnabas Sackett enthusiastically invests in goods that he will offer for trade in America. But Sackett has a powerful enemy: Rupert Genester, nephew of an Earl, wants him dead.
A battlefield promise made to Sackett's father [Ivo] threatens Genester's inheritance. So on the ever of hsi departure for America, Sackett is attacked and thrown in to the hold of a pirate ship.
Genester's orders are for him to disappear into the waters of the Atlantic. But after managing to escape, Sackett makes his way to the Carolina coast. He sees in the raw, abundant land the promise of a bright future. But before that dream can be realized, he must return to England and discover the secret of his father's legacy.
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From the inner cover:
The Sacketts -
There story is the story of the American frontier, an unforgettable chronicle of the men and women who tamed a wilderness and built a nation with their dreams and their courage.
Created by master storyteller Louis L'Amour, the Sackett saga brings to life the spirit and adventures fo generations of pioneers. Fiercely independent and determined to face any and all challenges, they discovered their destiny in settling a great and wild land.
Each Sackett novel is a complete, exciting historical adventure. Read as a group, they tell the thrilling epic tale of a country unlike any the world has ever known. And no one writes more powerfully about the frontier than Louis L'Amour, who has walked and ridden down the same trails as the Sackett family he has immortalized. the Sackett novels represent L'Amour at his very best and are one of the greatest achievements of a truly legendary career.