In the context of the statement "Why aren't they called by their more common name/label?", the phrase "other persons" typically refers to individuals or groups who are marginalized or discriminated against, and whose identities are often erased or obscured by the use of more general or derogatory terms.
The use of more specific and respectful terms helps to recognize the unique identities and experiences of these groups, rather than lumping them together under a broad and potentially offensive label. It also helps to promote inclusivity and understanding, and to challenge harmful stereotypes and prejudices.
The use of the phrase "other persons" can also be a way of acknowledging the diversity of experiences within a particular group. For example, someone might say, "The term 'disabled people' is a good starting point, but it does not always capture the experiences of all other persons who identify as disabled.