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"The Act of Union with Scotland (1707) required that England and Scotland should have one flag made of the crosses of St. George and St. Andrew combined. After the union with Ireland (1801) the cross of St. Patrick was incorporated in the flag. The name 'Jack' comes from the French Jacques, referries to James I, the first sovereign of Great Britain."—Webster, 1920

The Union Jack

"The Act of Union with Scotland (1707) required that England and Scotland should have one flag made…