Rule 1. Amines can be named as derivatives of alkylamines or alkanoamines. Let's see some examples.

Ethylamine (Ethanamine)

Cyclopentylamine (Cyclopentanamine)

(Pent-2-yl)amine (Pentan-2-amine)

Rule 2. If a radical is repeated several times, it is indicated with the prefixes di-, tri-,...
If the amine carries different radicals, they are named alphabetically.

trimethylamine

ethylmethylpropylamine

Isopropylmethylamine

Rule 3. The substituents attached directly to nitrogen carry the locant N. If there are two substituted amino groups in the molecule, N,N' is used.

N,N-Dimethylpentanamine

N,N'-Dimethylpentane-1,5-diamine

Rule 4. When the amine is not the functional group, it is renamed amino-. Most of the functional groups have priority over the amine (acids and derivatives, carbonyls, alcohols)

6-Aminoheptan-2-one

3-Aminocyclohexanol

Methyl 4-Aminocyclohexanecarboxylate