Hello, Joe. In Portuguese, we frequently use INHO and INHA in the end of words. Literally, it means small/short. Sometimes it's just a friendly way to call something or someone.
Examples: If I have a small plant in my garden I can say "Eu tenho uma planta pequena no meu jardim". But I can also say "Eu tenho uma plantinha no meu jardim".
When we talk about names, you can say "Eu tenho uma priminha de 3 anos de idade. Nós a chamamos de Aninha." Priminha and Aninha means that my cousin Ana is young and/or we care about her, we love her.
I hope you understand the explanation :)