Is this a grandfather tree?
This appears to be a Japanese maple with a finely divided leaf known as Acer dissectum. The entire plant's growth habit also suggest a Japanese maple. Here is an image that looks similar: http://www.ornamental-trees.co.uk/acer-palmatum-dissectum-tamukeyama-tree-pp526
There are hundreds if not thousands of Japanese maple varieties. We cannot say exactly which one this is.