Grandparent
Etymology

The use of the prefix "grand-" dates from the early 13th century, from the Anglo-French graund. The term was used as a translation of Latin magnus. The prefix "great-" represents a direct translation of Anglo-French graund and Latin magnus to English. In Old English, the prefixes ealde- (old) and ieldra- (elder) were used (ealdefæder / -mōdor and ieldrafæder / -mōdor). A great-grandfather was called a þridda fæder (third father), a great-great-grandfather a fēowerða fæder (fourth father), etc.
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