Hinduism has always been open to allowing other influences, from Ramakrishna having images of Jesus and Mary on his altar to the Arya Samaj not allowing depictions of God. It is certainly possible to include Egyptian, Celtic, or other deities into the practice of Hinduism in exactly the same way that village deities can be added to the traditional Gods. As I say in my post “Anna is now Shiva Setep-en Het-Heru. What does ‘following Sanatana Dharma’ mean?” it is possible for people to follow eclectic paths and still be a Hindu.
However the way someone refers to themselves reflects their inner spiritual outlook. Two people may carry out very similar spiritual practices and one call themselves a Hindu and another a Wiccan or a follower of Celtic beliefs. I am happy to call them what they call themselves. The blogs on this page are by such people; strongly influenced by Hinduism, incorporating Hindu practices and often being devotees of Hindu Gods, but by their own reckoning not Hindus.
Laketi is a blog by an African American ex-Christian blogger. She is a devotee of Shiva, but is also strongly influenced by the Ancient Egyptian religion.
This is a very thoughtful blog by a pagan blogger who is also influenced by Sanatana Dharma. It’s worth reading her earlier posts about how she carried out a spiritual experiment which involved following several religions or practicess (Hinduism, Feri tradition, Christianity, and “place”) for a fixed period.
Blog: The Los Perspective
The Los perspective is a very professional looking blog by an Argentine-American follower of Wicca who is heavily influenced by Hinduism. It is worth browsing the Hinduism category and the Wicca/Pagan category to get a feeling of the diverse influences on the blogger, who describes himself as a “Shivaist Wiccan”.