One verse

Srimad Bhagavatam 9.20.6

9.20.6

ऋतेयो रन्तिनावोऽभूत् त्रयस्तस्यात्मजा नृप । सुमतिर्ध्रुवोऽप्रतिरथ: कण्वोऽप्रतिरथात्मज: ॥ ६ ॥

rteyo rantinavo ’bhut trayas tasyatmaja nrpa sumatir dhruvo ’pratirathah kanvo ’pratirathatmajah

rteyoh
from the son named Rteyu
rantinavah
the son named Rantinava
abhut
appeared
trayah
three
tasya
his (Rantinava’s)
atmajah
sons
nrpa
O King
sumatih
Sumati
dhruvah
Dhruva
apratirathah
Apratiratha
kanvah
Kanva
apratiratha-atmajah
the son of Apratiratha.

Rteyu had a son named Rantinava, who had three sons, named Sumati, Dhruva and Apratiratha. Apratiratha had only one son, whose name was Kanva.