I am not researching these people, just entering information from one of my books - "Abstracts of Charles County, Maryland Court and Land Records, 1665-1695, Volume 2" by Elise Greenup Jourdan:
"Libers C to I, 1665-1688 - Maycocke, Seabright, s/o Seabright Maycocke, d. 5 Sep 1674 (F.10)
"Servants and masters, Libers C-L (1665-1685) - Fish, Elinor (bound to age 21), age 3, Master - Seabright Maycocke, 1674."
I believe this is the same family; just misspelled (twice): "Liber K, page 28 - 30 Aug 1682; Indenture from Mary Mayrood, late of Charles Co., now of Baltimore Co., widow, relict of Seabright Mayrook, to Randolph Brandt, Gent., for 1,6003 tobacco a parcel of land called 'Mayrooks Rest;' containing 85 acres; signed by Mary Mayrook; wit. Henry Henly, Tho. Jones, Mith'll Judd."