A brother or brother-in-law of one's father.(noun)
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Use "paternal uncle" in a sentence
"When, at twenty-five years of age he returned home, after having been called to the bar, he received from his paternal uncle the style and title of Baron de Montesquieu, by which he was afterwards known, and became councillor of the Bordeaux Parliament."
"Abbaside Caliphs descend from Al – Abbas, paternal uncle of"
"My father was a wealthy merchant and Allah had vouchsafed him no other child than myself; but I had a cousin, Azízah hight, daughter of my paternal uncle and we twain were brought up in one house; for her father was dead and before his death, he had agreed with my father that I should marry her."