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uniname
Combined from primary sources listed below.

In Cool§

See primary documentation in context for routine uniname 

sub uniname(Str(Cool) --> Str)
method uniname(--> Str)

Interprets the invocant or first argument as a Str, and returns the Unicode codepoint name of the first codepoint of the first character. See uninames for a routine that works with multiple codepoints, and uniparse for the opposite direction.

# Camelia in Unicode
say ‘»ö«’.uniname;
# OUTPUT: «RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK␤»
say "Ḍ̇".uniname; # Note, doesn't show "COMBINING DOT ABOVE"
# OUTPUT: «LATIN CAPITAL LETTER D WITH DOT BELOW␤»

# Find the char with the longest Unicode name.
say (0..0x1FFFF).sort(*.uniname.chars)[*-1].chr.uniname;
# OUTPUT: «BOX DRAWINGS LIGHT DIAGONAL UPPER CENTRE TO MIDDLE RIGHT AND MIDDLE LEFT TO LOWER CENTRE␤»

Available as of the 2021.04 Rakudo compiler release.