How to select checkbox with dynamic xpath using Selenium webdriver

The HTML Section is -

I need to select the checkbox shown in the image based on the firstname and lastname value passed to the function

This is what I have written and it is helping me to click on the hyperlink of the lastname but I need to select the checkbox which is present in front of the

public void selectEmpFromList(String firstName, String middleName, String lastName, boolean checkOrUncheck) throws UIAutomationException {
       try{
           boolean flag = false;
            //WebElement webElement = elementController.waitForWebElement(BrowserDriver.getBrowserDriver(), null, false, "EmployeeTable");
            //List<WebElement> gridRow = elementController.waitForWebElements(BrowserDriver.getBrowserDriver(), webElement, false, "ClientsGridData");

            elementController.setWebelement(elementController.waitForWebElement(BrowserDriver.getBrowserDriver(),null,false,"EmployeeTable"));
            elementController.setWebelements(elementController.waitForWebElements(BrowserDriver.getBrowserDriver(),elementController.getWebelement(),false,"tagtr"));

            // Loop until we get the current web element for the folder
            for(int tr=0;tr<elementController.getWebelements().size();tr++)
            {
                WebElement firstColumn =elementController.waitForWebElement(BrowserDriver.getBrowserDriver(), elementController.getWebelements().get(tr), false, "firstColumn");
                if(firstColumn.getText().toString().trim().equalsIgnoreCase(firstName))
                {
                    WebElement lastColumn =elementController.waitForWebElement(BrowserDriver.getBrowserDriver(), elementController.getWebelements().get(tr), false, "lastcolumn");
                    if(lastColumn.getText().toString().trim().equalsIgnoreCase(lastName))
                    {
                        //lastColumn.click();
                        //WebElement checkbox = tableRows.get(count).findElement(By.xpath("td[1]"));
                        commonUI.clickOnCheckBox("EmpCheckBox", true);                          
                        flag = true;
                        break;
                    }
                }
             }
            if(!flag)
            {
                System.out.println("Not found");
            }
         }catch(Exception exception) {
                throw new UIAutomationException("Unable to select an employee from the record list. [clickOnSaveButton()]: " + exception.getMessage());
           }

The xpath used for table n firstname n lastname are

<Element title="lastcolumn">
    <xpath>td[4]/a</xpath>
</Element>
<Element title="firstColumn">
    <xpath>td[3]/a</xpath>
</Element>
<Element title="EmployeeTable">
    <xpath>//table[@id='resultTable']/tbody</xpath>
</Element>

Could you please suggest me the xpath for checkbox or the logic for what should be used for checking the checkbox??