consider using a hash to store your arrays.

my %arrays = (
    array1 => [qw( a b c )],
    array2 => [qw( d e f )],
);

my @combined = ( @{ $arrays{array1} }, @{ $arrays{array2} } );
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this makes it easy to replace 'array1' with a variable, $array_name.

see How can I use a variable as a variable name?