@MinecraftDiamondGurl came up with the first 10 of these and then @ShelbieWrites came up with the 6 afterwards :)

741) Mysteries of the island

742) Mysteries of the 5 diamonds

743) The missing pearl

744) The mysterious man/woman

745) The alpha calls

746) Misguided

747) The Missing/mysterious stone

748) Make-believe

749) The missing/mysterious crystal

750) Marionette

751) I'll Always Be There

752) Totally Different

753) Go With The Flow

754) Addicted

755) (Under) Your Protection

756) Just A Coincidence?

757) Forget you

758) Embrace

759) Letters

760) (Never) Looking back