What is the name of this writing mark (~)?
brackets
colon
tilde
asterisk
The tilde  is a grapheme with several uses. The name of the character came into English from Spanish and from Portuguese, which in turn came from the Latin titulus, meaning "title" or "superscription".  In lexicography, the swung dash (⁓) are used in dictionaries to indicate the omission of the entry word.
reach: rather globallanguagessymbols
Answers by country
brackets
colon
tilde
asterisk
answers
 the United States
the United States46
 the United Kingdom
the United Kingdom38
 Republic of Ireland
Republic of Ireland10
 Poland
Poland1470
 India
India21
 Australia
Australia10
 Germany
Germany36