Using the Digital Image Reference System for Land Survey, Subdivision, and Condominium Plats located online at the Maryland State Archives
From the MSA Home Page click the Family Historians tab.
Then select the Plats.net link located by Find Specific Records
Choose the County you wish to research.
I am researching Prince Georges County:
| Prince George's County Land Survey, Subdivision, and Condominium Plats|
Clicking on Advanced Search gives a Description field
Here I entered a surname as the search keyword.