Guillemets
Guillemets are a pair of punctuation marks used to enclose quoted text in many languages. The left guillemet is « and the right one is ». They are also known as angle quotation marks or chevrons and are commonly described as double angle quotation marks in English. In Unicode they appear as U+00AB and U+00BB, with single-angle variants ‹ and › at U+2039 and U+203A. In plain text contexts, people sometimes substitute << and >> when the marks are not available.
The term guillemet comes from the French given name Guillaume (William), in reference to a diminutive form
Guillemets are widely used to enclose quotations in languages such as French, Italian, Spanish and Portuguese,
Some languages also employ the single-angle guillemets ‹ and › for specific purposes or nested quotes. When digital