Next to mainly African hairstyles like rasta braids, twists, cornrows and similar (also see Our Gang), more than 2 braids are quite unusual, I think.
Pics 1+2 showing Thekla of Schloss Einstein in ep 148 and 149. 2 regular, thicker pigtails maybe more at the rear and 2 or more thinner ones in front of that, more from above.
Pic 2 showing Anna next to Thekla in rather red hair and Paula on the front with looped pigtails. Pic 3 showing the long loops of Paula in ep 158. I don’t like that.
Pic 4 showing I think Louisa on the right with 2 rows of braids at each side and rather ponytails. On the left Elizabeth, this time not in pigtails but somehow wild plaited. Ep 149.
Update 4 pigtails even better also in Fabrixx (rating 6)
An Indian teen boy in 3 pigtails in Susannah of the Mounties.
A young girl in 4 or more pigtails in Dilhiroj.
A teen boy in Like Mike (2002), 4 rasta braids.
(Teen) girl in The Wonder Years (1988) s2e15, 3 rare pigtails