No. Rajulan refers to two men and is an ordinary dual. By contrast, al-abawan or al-qamaran gathers two differently designated referents under a dual based on one member’s word.
Ordinary dual: two literal instances of the base designation.
Predominance-based dual: two associated referents, not both literally named by the base word.
The number is two in both cases; the relation between wording and referents differs.