Things saving the memory of gone people -- are called?

We all love to save things, collect items, items/things that remind us of departed souls or gone people. They're gone from life, but may or may not be dead. What are those things called?

They might not be expensive, but they are close to the heart. Whenever we see them they remind us of the people they belonged to.

What do we call these things? Do they have any particular name?

Examples:

• A girl has saved her ex-boyfriend's written letters.
• A daughter has saved her dead father's watch.

There are a number of words that have a more personal attachment to them, such as

keepsake: anything kept, or given to be kept, as a token of friendship or affection; remembrance.

memento: an object or item that serves to remind one of a person, past event, etc.; keepsake; souvenir.

remembrance: something that serves to bring to mind or keep in mind some place, person, event, etc.; memento.

Less personal is souvenir: a usually small and relatively inexpensive article given, kept, or purchased as a reminder of a place visited, an occasion, etc.; memento.

(Source: Dictionary.com)

Memorabilia can be used to refer to personal items, though its usual meaning relates more to events, teams etc. From Merriam Webster:

objects or materials that are collected because they are related to a particular event, person, etc.