>>40740031
"Babaji" is a title, and can refer to a lot of people. Generally a babaji is someone who is considered wise and in good standing, but who is eccentric and not "fitting" the standard structure or ashram life of a disciplic line. "Baba" means "father" or "elder", with "-ji" being a familiar honorific. "Dear elder," in a sense, except I would suggest it being closer to "uncle", as in the black sheep weirdo of the family.
Kriya Yoga and Yogananda were likely talking about Mahavatar Babaji, who is entirely legendary.
There is also Haidakhan Babaji, whom you can google.
In my own tradition the two most prominent babjis are Jagannath dasa babaji and Gaura Kishore dasa babaji.