Tetteh is a Ga personal name associated with birth order. Zimmermann (1858) records 'Tete' as the proper name of first-born sons (compare Dede for first-born girls) and notes that a first-born boy is generally called Tete. He also lists a separate entry 'Tete' as a name of second sons, apparently a distinct (tonal or spelling) form.
Tetteh is a Ga birth-order name.