great family of Dravidiau languages

the great family of Dravidiau languages, the mother-tougues of some fifty-seven 
millions of men, covering the whole of Southern India and Northern Ceylon, northwards appearing in smaller scattered areas, and lastly represented after an interval of hundreds of Hues on the west by the isolated Hrahui of Baluchistan, numerically the most important is the Andhra or Telugu, spoken by about twenty millions.

Ear Rings of Satavahana queen

The Sātavāhanas ruled a large and powerful empire that withstood the onslaughts from Central Asia. Aside from their military power, their commercialism and naval activity is evidenced by establishment of Indian colonies in southeast Asia.
The Sātavāhanas began as feudatories to the Mauryan Empire. They seem to have been under the control of Emperor Ashoka, who claims they were in his domain, and that he introduced Buddhism among them:

Here in the king's domain among the Yavanas (Greeks), the Kambojas, the Nabhakas, the Nabhapamkits, the Bhojas, the Pitinikas, the Andhras and the Palidas, everywhere people are following Beloved-of-the-Gods' instructions in Dhamma.
—Rock Edict Nb13 (S. Dhammika)

The Satavahanas declared independence sometime after the death of Ashoka (232 BCE), as the Maurya Empire began to weaken.

It is believed that they were originally Brahmins, practicing Hindu religion (as per Sthala Purana of Amaravathi. Some rulers like Maharaja Satakarni are believed to have performed Vedic sacrifices as well.
They were not only worshipers of Vishnu and Shiva but also respected Buddha, but also other incarnations of, Gauri, Indra, the sun and moon.They were mostly Buddhistic Vaishnavites. Under their reign, Buddha had been worshiped as a form of Vishnu in Amaravati

Kotilingala ancient site of pre-Satavahana

Archaeological evidence indicates that Kotilingala (karimnagar) in Andhra Pradesh was the ancient site of pre-Satavahana and early Satavahana kings.The Satavahana was a Brahmin dynasty first mentioned in the Aitareya Brahmana, dating back to the 8th century BCE mentioning them to be of Vishwamitra's lineage. In the Pūrānas and on their coins the dynasty is variously referred to as the Sātavāhanas, Sātakarnīs, Andhras and Andhrabhrityas.[citation needed] A reference to the Sātavāhanas by the Greek traveller Megasthenes indicates that they possessed 100,000 infantry, 1,000 elephants, and had more than 30 well built fortified towns:

Next come the Andarae, a still more powerful race, which possesses numerous villages, and thirty towns defended by walls and towers, and which supplies its king with an army of 100,000 infantry, 2,000 cavalry, and 1,000 elephants.
—Plin. Hist. Nat. VI. 21. 8-23. 11., quoting Megasthenes


http://telanganacharitra.blogspot.com/2010/02/archaeological-evidence-show-capital-in.html

Telugu Pre Satavahana

Satavahanas established relationships with Naga, Yaksha, and Dravida tribes of Vindhya mountains who already were living there then. Telugu, Tamil, and Kannada are Dravidian languages.the first settlement of Tenugu  people.

Teli river in Jataka tales

Bhuddhist Jataka tales were written during 200-250 BC.Give details of  Tel river is a subriver of Mahanadi in Orissa. This confirms that one of the Andhra tribes migrated this way also. The people in this tribe are Kalingas (ka'Limgulu). The books cited above describe the Andhras and Kalingas as two different branches of a single tribe. Sometimes these two words (Andhras and Kalingas) are used 

Andhra Telugu ef in Mahabharata

 Kalingas along with ANDHRAS WERE supporting the Kauravas during the battle Mahabharata. Sahadeva defeated the kingdoms of Pandya, Dravida, Odhra, Kerala, Andhra, and Kalinga while performing the Rajasooya yajna. This is depicted in the Mahabharatam. Chanoora (ca'NooruDu) was killed by Srikrishna in Madhura. Harivamsapuranam corroborates the fact that Chanoora was the king of Karoosa Desa (karooSa dESam) (on the North side of Vindhya and on the North banks of Yamuna river) and was an Anhdra (Andhrudu) too. 

Ancient Andhra tribe

Andhra is one of the ancient tribes of India. One can encounter several tales about Andhras in epics like Mahabharatam and Ramayanam, in great puranas, and Budhdhist Jataka Tales. This confirms the ancient nature of Andhra society.