The term 'Olive Family Trees' refers to the olive trees that are part of the Oleaceae family. The Oleaceae family includes a variety of plants, including ash trees, which is represented in the crossword solution 'ASHES'. Ash trees are deciduous trees that are native to many parts of the world, and they are often used for timber and firewood. Olive trees are also part of the Oleaceae family, and they are cultivated for their edible fruit, oil, and wood.