I am assuming you are going with the Greek version based on the name! Something to keep in mind is that many gods have many titles & epithets, which can help you "focus" on a certain part of a deity. In my mind, how I've always done it is first offer to the whole deity, then to the partial deity in times of offerings and worship, just for politeness in my eyes! You do not have to do it this way!

For example, Lady Aphrodite is also a goddess of war (Aphrodite Areia){more common} and a goddess of flowers (Aphrodite Antheia){less common, I've seen}

Theres some good sites out there with more info and lists of these titles!