Common Name: 

Some 35 species of mostly deciduous trees or shrubs, gray, smooth or scaly bark, slender shoots, lacking a terminal bud.  Leaves alternate, simple, in 2 rows, usually serrate, with 7-14 vein pairs.  Female catkins terminal, erect at first, later pendulous, 5-20+ pairs.  Fruit a small ribbed nutlet subtended by a persistent three-lobed or deeply toothed bract.  Native ranges include Europe to East Asia and North and Central America.

Carpinus: classical Latin name

Hornbeam: The common English name hornbeam derives from the hardness of the woods (likened to horn) and the Old English beam "tree" (cognate with Dutch ‘’Boom’’ and German Baum) (Wikipedia). 

Betulaceae (Birch Family)