Hi, Brenda. I checked the 1850 KY census, and can't find your Martin in Harrison Co. I did find a Marcus, 7 years old, son of George A. King as follows: 1850 Harrison County, KY, census, 19 Jul 1850, District 1 22 22 George A. King 38 m tanner 300 Ky Ann 34 f KY John 15 m Ky Erwin? 8 m Ky in school Marcus 7 m Ky Ann 4 f Ky Addison 2 m Ky (a George King m. Sarah Garrett in Harrison Co, KY, 11 June 1829 - possibly an earlier marriage before Ann?) There were no Havicus families in the state of KY in 1850 nor in Harrison in 1880, according to census data. However, a Clemens Havens m. Elizabeth James in Scott Co, KY, 17 Feb 1843. In 1850, we find Clemens Havercriste in Scott Co, KY: 1850 Scott Co, KY, 17 Sept 1850, District 2 782 782 Clemens Havercriste 35 m farmer 500 Germany Elizabeth 29 f Ky Peter 6 m Ky Mary E. 4 f Ky Frances 1 f Ky living next door to Frances Jones 783 783 Frances Jones 57 f 1100 VA Dorcas 22 f Ky George 18 m farmer Ky Thomas Wells 22 m laborer Ky and 784 784 William Jones 26 m farmer 550 Ky Eliza 20 f Ky Nelson 5 m Ky Ferdinand 3 m Ky Elizabeth 2 f Ky and several other Jones families a few homes further away. Hope this helps! Lori