One verse

Srimad Bhagavatam 9.13.13

9.13.13

जन्मना जनक: सोऽभूद् वैदेहस्तु विदेहज: । मिथिलो मथनाज्जातो मिथिला येन निर्मिता ॥ १३ ॥

janmana janakah so ’bhud vaidehas tu videhajah mithilo mathanaj jato mithila yena nirmita

janmana
by birth
janakah
born uncommonly, not by the usual process
sah
he
abhut
became
vaidehah
also known as Vaideha
tu
but
videha-jah
because of being born from the body of Maharaja Nimi, who had left his material body
mithilah
he also became known as Mithila
mathanat
because of being born from the churning of his father’s body
jatah
thus born
mithila
the kingdom called Mithila
yena
by whom (Janaka)
nirmita
was constructed

Because he was born in an unusual way, the son was called Janaka, and because he was born from the dead body of his father, he was known as Vaideha. Because he was born from the churning of his father’s material body, he was known as Mithila, and because he constructed a city as King Mithila, the city was called Mithila.