I’ve given notebooks to my mom to encourage her to write, but don’t think I ever wrote her name on the cover. The next one will have it.
Also, consider recording a conversation between you and your loved one with the voice recorder on your phone. I have one brief recording of my dad’s voice in an old VHS tape that I burned to DVD and copied to the computer, and that’s it.
Memories.
Often the most powerful objects in films, to me, are photographs. Like the polaroids in Thelma and Louise and both Blade Runners.
Also old school VHS footage, like in Bassackwards by Kurt Vile — https://www.youtube.com/watch?v=pOFWHty4XFQ — and What About That Day by Jenny O. https://www.youtube.com/watch?v=pxCBnKu5jyk