How to store multiple relationships in MySql - mysql

Question

If I have multiple objects and anyone can potentially map to multiple other ones.
A -> B, C, D, E
B -> A, E, F, C
C -> B
etc.
How would I store these entities in MySql and use JPA + Hibernate to manage them. For example, If I search "A", it will return "B,C,D,E", and if I search "C", it will return "B", etc.
Edited:
Follow suggestion, I did the following:
[test]> describe relation;
+----------+---------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+---------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| id_start | int(11) | YES | | NULL | |
| id_end | int(11) | YES | MUL | NULL | |
+----------+---------+------+-----+---------+----------------+
3 rows in set (0.00 sec)
MariaDB [test]> describe entity;
+-------+------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(5) | YES | | NULL | |
+-------+------------+------+-----+---------+----------------+
2 rows in set (0.00 sec)
MariaDB [test]> select * from entity;
+----+------+
| id | name |
+----+------+
| 1 | A |
| 2 | B |
| 3 | C |
| 4 | D |
| 5 | E |
| 6 | F |
+----+------+
6 rows in set (0.00 sec)
MariaDB [test]> select * from relation;
+----+----------+--------+
| id | id_start | id_end |
+----+----------+--------+
| 1 | 3 | 1 |
| 2 | 2 | 1 |
| 3 | 4 | 1 |
| 4 | 5 | 1 |
| 5 | 1 | 2 |
| 6 | 5 | 2 |
| 7 | 6 | 2 |
| 8 | 3 | 2 |
| 9 | 2 | 3 |
+----+----------+--------+
9 rows in set (0.00 sec)
[test]> select E.name, R.id_start from relation R join entity E on E.id=R.id_end where E.name="A";
+------+----------+
| name | id_start |
+------+----------+
| A | 3 |
| A | 2 |
| A | 4 |
| A | 5 |
+------+----------+
Question:
This query returns the related Ids of 'A', which is right, but not actually B, C, D, E. How to get the actual related names from entity table? Is it a database design or SQL statement mistake?