Is it ambiguous for a girl to call a boy's name followed by a brother, such as a brother?

According to the description of the question, it is not ambiguous for a girl to call a boy's name followed by her brother.

Everyone's personality is different, and their understanding of the problem will be different. Little brother and little sister are no longer ambiguous or derogatory terms. Therefore, from the description of the problem, it can also be understood as a fashionable title with courtesy. The key lies in how the parties understand and interpret it.

Personality determines behavior.

Behavior is controlled by situational force (external force), personal quality (internal force), and to what extent. Among the internal variables, attitude is very important, but motivation, values and personal qualities may also be the key. Although there are many kinds of personality theories, American personality psychologists emphasize the measurement of personal qualities.

Such qualities as self-esteem, need for recognition, authoritarianism, dogmatism, achievement needs, power orientation, cognitive differences and communication needs have been widely studied. Once these qualities and other qualities are measured, researchers usually try to further investigate whether there is some connection between them and whether they can predict other qualities and behaviors.