Complex sentence: On 17 April 1875 he married Leonora Blanche Alleyne, youngest daughter of C. T. Alleyne of Clifton and Barbados, and variously credited (or should have been) as author, collaborator, and/or translator of Lang's Color/Rainbow Fairy Books he edited.
Split into simpler sentences: On 17 April 1875 he married Leonora Blanche Alleyne, youngest daughter of C. T. Alleyne of Clifton and Barbados. She was (or should have been) variously credited as author, collaborator, and/or translator of Lang's Color/Rainbow Fairy Books he edited.