A long-lost relative appearing is read as a forgotten part of your story returning. Dream books link it to reconnection and the sense that there is more to where you come from.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.