How is the thirteenth treasure found

Hint 1 of 9:

The name is formed in the jagged block grid on the Map

Hint 2 of 9:

The Couple has a clue

Hint 3 of 9:

The Family has a clue

Hint 4 of 9:

The Children have a clue

Hint 5 of 9:

Actually, take all the words and letters that have not been used yet