Sub-Mariner 36 - April 1971
Purchased from @ghostcactus_comics A bargain at $5.
Namor seeks out Proteus to preside over his marriage to Lady Dorma. When he returns, he finds Attuma attacking Atlantis but is overwhelmed by the calvary/wedding guests.
Spoilers. Namor marries Llyra, who was posing as Lady Dorma. Who declares she is the queen of Atlantis.