use charnames ":full"; BEGIN{ my $s = $^H{charnames}; $^H{charnames} =
+ sub { $_[0] =~ /^\$(.*)/s ? &$s($$1) : &$s; } } BEGIN { $name = "LAT
+IN SMALL LETTER P"; } print "j\N{LATIN SMALL LETTER A}\N{$name}h\n"
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Update: short version:

use charnames ":short"; BEGIN{ my $s = $^H{charnames}; $^H{charnames} 
+= sub { $_[0] =~ /^\$(.*)/s ? &$s($$1) : &$s; } } BEGIN { $name = "la
+tin:p"; } print "j\N{latin:a}\N{$name}h\n"
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