Echoes
Atum, Ra, Horus and 2 more
One god under five names (Atum, Ra, Horus, Khepri and Harpocrates), across The Gift of the Nile.
Why the sources call them one god
His morning aspect was the scarab Khepri, his midday aspect Ra
naming himself Khepri in the morning, Ra at noon, Atum in the evening
The fusion of Ra with Atum (Atum-Ra), with Khepri (Khepri-Ra), with Horus (Ra-Horakhty), and with Amun (Amun-Ra)
they tend to merge in the popular imagination, and were already merging in antiquity
From the entry on Horus, naming Harpocrates
he was rather an aspect of Ra, the morning aspect
Harpocrates was Horus the Child — the form of Horus as the divine infant in his mother's arms
From the entry on Harpocrates, naming Horus