There are two versions about the name of the place.
Harida Maharishi performed Tapas for many years. The rishi was overwhelmed when the Lord revealed His form and composed the Srisukthi (Tirumozhi) dealing the Varnashrama Dharma, Anushtana Prakarana (duties to be performed at five times a day) and samhita (which deals with yoga) and hence the place is called Tirumozhikalam and the Lord took the name Tirumozhikalathan at the request of the rishi.
The natives call the Lord as Lakshmana. As per sthala purana, Lakshmana prayed this Lord repenting his action of suspecting Bharata when he came to Chitrakootam and was overwhelmed by the embrace of Lakshmana. Since this sthala brought back the comradeship between the two, this place is called Tirumoozhikalam.
This place is about 24 kms from Alappuzha (Alwaye) by road on way to Ernakulam, and about 5 kms from Angamali Railway station on the Ernakulam - Allapuzha Line.