The exclusion trick: \w and [^\W] match exactly the same thing, so to match a \w but not a \d, just use [^\W\d]

#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11122003
use warnings;

my $text = "John P5ete Andrew Richard58 Nic4k Le7on5";
my @names = $text =~ /\b[^\W\d]*\d[^\W\d]*\b/g;
print "@names\n";
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Outputs:

P5ete Nic4k
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