Brackets

• ( ) – parentheses, brackets (UK, Canada, New Zealand, South Africa and Australia), parens, round brackets, first brackets, or circle brackets
• { } – braces are “two connecting marks used in printing”; and in music “to connect staves to be performed at the same time”^[3] (UK and US), French brackets, curly brackets, definite brackets, swirly brackets, curly braces, birdie brackets, Scottish brackets, squirrelly brackets, gullwings, seagulls, squiggly brackets, twirly brackets, Tuborg brackets (DK), accolades (NL), pointy brackets, second brackets, fancy brackets, M Brace, moustache brackets.
• [ ] – square brackets, closed brackets, hard brackets, third brackets, crotchets,^[4] or brackets (US)
• ⟨ ⟩ – pointy brackets, angle brackets, triangular brackets, diamond brackets, tuples, or chevrons
• < > – inequality signs, pointy brackets, or brackets. Sometimes referred to as angle brackets, in such cases as HTML markup. Occasionally known as broken brackets or “brokets”.^[5]
• ⸤ ⸥; ｢ ｣ – corner brackets
• ⟦ ⟧ – double square brackets, white square brackets
• 〔 〕 – tortoise shell brackets
• Guillemets, ‹ › and « », are sometimes referred to as chevrons or [double] angle brackets, but are not used as brackets.

http://www.thepunctuationguide.com/period.html