As the returning families are carefully counted and recorded, special attention is given to keeping distinct groups separate, especially when they share striking similarities. Among the returnees is a second family named Elam. Commentators [מצודת דוד, ביאור שטיינזלץ] agree that they are explicitly identified as the "other" Elam to ensure they are not mistaken for the first family of the same name listed earlier in the count.
This clarification is highly necessary because both families also share the exact same number of members. To prevent any confusion or assumption that the original group is simply being recorded twice, the count makes it clear that this is a completely different family. Both groups have populations perfectly equal in size, with each consisting of exactly one thousand two hundred and fifty-four people.