Question

although amino acids have acid in their name

Answer 1

Although amino acids have "acid" in their name, some are acidic in water solutions, some are basic, and others are neutral. 

The pH of the amino acid is determined by the type of side chains present on that amino acid.

An amino acid has both an amine and acid groups which is neutralized in the zwitterions. These amino acids are neutral unless there is an extra acid or base on the side chain. If neither is present then, the whole amino acid is neutral. 

If the side chain contains an amine functional group, then the amino acid will be basic in nature because the extra amine group will not get neutralized by the acid group.

The presence of a carboxylic acid functional group at the side chain makes the amino acids acidic in nature.

Answer 2

Amino acids have acids in their name but all the amino acids are not the acidic, some are acid and some are basic and some may be neutral.
The acidity or basicity depends on the side chain present on the amino acids while absence of side change considered amino acid as the neutral .Presence of extra amine group in the side change make it basic while if a carboxylic group is attached at side then it will be acidic.