Sree Vijaya Ancestary
According to Mahavamsa sree vijaya belonged to Vanga(Bengal) and Kalinga(orissa), subsequently got exiled from there because of the evil ways and landed in Tambapanni(ancient Lanka). Nissanka Malla's inscriptions mention Simhapura as the capital of Kalinga.
The arena associated with the legend of Vijaya and his followers may be in Sihapura (Simhapura), in the Lala Rattha (Lata Rashtra) either latur area in present day konkan or one more in Gujarat.
There is an epic reference to one Simhapura kingdom located on the upper Indus which shared borders with Ursa, Abhisara, Bhlika, Darda and Kamboja. Seventh century Chinese pilgirm Hiun tsang also refers to this Simhapura (Sang-ho-pu-lo) and localises it on upper Indus, in Gandhara (north--west Punjab).
So there is a substantial points of view of ancestary of Sri vijaya.