Key points
Relationship: Mariah is the sister of Angelo; they are siblings.
Who is Angelo
Angelo is a widely shared name with multiple notable figures, most commonly associated with professional athletes and entertainers. Because the name is common, public references to "Angelo's sister Mariah" require clear identification of the specific Angelo in question. Without additional context specifying which Angelo is meant, the safest general statement is that Mariah is the sister of a person named Angelo. If the query refers to a particular public figure, that figure must be confirmed to reliably describe Mariah's connection to him.
Public information about Mariah
Details about Mariah are only as specific and reliable as the context around the name Angelo. In many instances, references to Angelo's sister Mariah describe a family relationship that is not extensively documented in public sources. When available, information may include background on her family, education, career (if any), and relationship with her sibling. If Angelo is a public figure, Mariah may occasionally appear in interviews or social posts, but such coverage is often limited and not always reliably sourced.
Why clarity matters
Because the name Angelo can refer to several individuals, mentioning Angelo's sister Mariah without specifying which Angelo can create confusion. To state clearly who Mariah is, it is necessary to identify the Angelo in question, whether that is through a full name, profession, or public context. Once Angelo is properly identified, more accurate and verifiable details about Mariah can be provided, including her age, background, or role in stories about her sibling.
Summary of the relationship
Mariah is the sister of Angelo. Beyond this sibling relationship, specific, widely sourced details about Mariah depend on identifying which Angelo is being referenced. Reliable information about her age, background, or public profile is only available when the context clearly identifies the individual named Angelo.