Tam: திருவையாறு tiruvaiyāṟu
‘Five Rivers’ Town, Tamil Nadu
From Tam: tiru, ‘eminent’, ‘prosperous’; aintu, ‘five’; and āṟu, ’river’.
Thiruvaiyuru sits in the middle of three parallel rivers and their tributaries: Kollidam, Kaveri (+Kudamurutti) and Vennar (+Vatar).
Tyagaraja, the 18-19thC Carnatic vocalist and composer, was born here.
For related place names see Indian Place names and Tamil Nadu place names.

River Kaveri from Tyagaraja memorial in Thiruvaiyaru Vadakkan