Chasteen
An American surname most likely developed from a shortened or altered form of a French-style given name or nickname, later fixed as a family name.
The #8,641 most common surname in the United States (2010 Census) — about 1 in every 81,142 Americans shares it.
Etymology
Chasteen is best treated as an Anglicized surname shaped by sound change and spelling variation rather than a transparent modern English word. It is likely related to a personal name such as Chastain/Chastain-like forms ultimately from French naming patterns, with the ending adapted in English spelling and pronunciation. The name probably does not mean "chaste" in a literal adjective sense for most bearers, even if it looks that way today.
History
The surname is found chiefly in the United States, where many such names were stabilized in spelling after immigration and internal migration. Forms like Chasteen often reflect local pronunciation and record-keeper spelling rather than a single original written form. Because the name is relatively uncommon, its family history is usually best traced through regional records and variant spellings.
Origin
Regions
Variant spellings
Fun fact
Names ending in -een or -ine in American records are often the result of repeated spelling reshaping, especially in communities where census and church clerks wrote names as they heard them.