Filberts, Beech, Oak, and Chestnuts are all related and all grow wild in America.
Oaks, beech and chestnut are in the family
Fagaceae. so not related
to oaks, beech and chestnut. Filbert relatives in the Betulaceae family
include birch and alder

This group of 300 kinds of tropical trees scattered all around the world from Australia to Africa are grouped into a catagory called "Java Olives"

White Oak
Black Oak

As a rule, acorns of the white oak mature in one year.   This makes them a sweeter acorn.  The black oak species take two years to mature instead of one year and are more bitter:

California White Oak   Q. lobata   The acorns form a large proportion of the winter food of the Indians of Northern California.   There were over 300,000 indians in California when it was discovered by the white man - all subsiding on acorns and other foods.

Emery Oak    Q. emoryi   Indians and Mexicans in the southwest eat the sweetish acorns of this tree.  The nuts are known by the Spanish name "bellotas - pronounced bay-YOH-tahs.
 
Holly Oak    Q. ilex    Mediterranean region and the orient.  The famous BALLOTTA acorn and the CHESTNUT acorn.   Common tree in southern France..  Also found in Spain and Portugal and nuts are highly prized.   The nuts are sold in Palestine bazaars as a roasted kernel.   This is perhaps the most edible acorn in the world and is prized by the Malayans.

English Oak
Truffle Oak    Q. robar  This acorn has served mankind well.   it is a famine-food in Europe.  The bread made from this nut is detestable, but is said to have been used in famine in large quantities to feed starving populations.   During a 1709 famine in France an illness called "trousse galante" followed acorn eating, but people survived and regained their health during the famine.      

Swamp White Oak   bicolor or Q. michauxii

Chestnut Oak     Q. prinus.

Post Oak    Q. stellata

Bur Oak    Q. macrocarpa