HBL speaks of humans as children of Heavenly Parents.
Clyde J. Williams, ed., The Teachings of Harold B. Lee (Salt Lake City: Bookcraft, 1996), 22
Now, the fact that you and I are here in mortal bodies is evidence that we were among those who were in that great concourse of organized intelligences; we knew God, our Father. He was our Heavenly Father; we were sired by Him. We had a Heavenly Mother—can you think of having a father without a mother? That great hymn “O My Father” puts it correctly when Eliza R. Snow wrote, “In the heav’ns are parents single? No, the thought makes reason stare! Truth is reason; truth eternal tells me I’ve a mother there.” Born of a Heavenly Mother, sired by a Heavenly Father, we knew Him, we were in His house, and we knew His illustrious Son, who was to come here and redeem mankind as a part of the plan of salvation.