Curious fact about Maiden's songs titles

Childhood’s End is also a Pink Floyd song, and Grateful Dead’s... and who knows how many other’s.

We could also say that A Matter of Life and Death is a 1946 UK movie released in the USA under the title Stairway to Heaven (and in Italy too). And that Somewhere in Time is also a 1980 USA movie.
Maiden has 2 songs about mothers(Mother Russia, Mother Of Mercy) and 7 about children (Moonchild, Children Of The Damned, Bring Your Daughter To The Slaughter, Seventh Son Of A Seventh Son, Childhood's End, Prodigal Son, Wrathchild) but none about fathers.