This is the 6334th most frequent Portuguese word.
danielle
"Danielle" is not a Portuguese word; it is a feminine given name used in multiple languages.
In this sentence, 'Danielle' is used as a proper noun, specifically as someone's name.
Danielle é uma excelente professora de música.
Danielle is an excellent music teacher.
Here, 'Dani' is a conversational diminutive or nickname derived from the name 'Danielle'.
Conhecemos Dani ontem na festa.
We met Dani yesterday at the party.
In this usage, 'daniela' refers to a concept or entity (in this case, a type of flower) and may or may not relate to the name 'Danielle' based on context.