In ClosedXML, is there anyway to get the column letter from column header name?

For version 0.95.4.0 I did the next steps

var ws = wb.Worksheet("SheetName");

var range = ws.RangeUsed();
var table = range.AsTable();

var cell = table.FindColumn(c => c.FirstCell().Value.ToString() == yourColumnName);
if (cell != null)
{
     var columnLetter = cell.RangeAddress.FirstAddress.ColumnLetter;
}

Sure, get the cell you want using a predicate on the CellsUsed collection on the row with the headers, then return the column letter from the column.

public string GetColumnName(IXLTable table, string columnHeader)
{
    var cell = table.HeadersRow().CellsUsed(c => c.Value.ToString() == columnHeader).FirstOrDefault();
    if (cell != null)
    {
        return cell.WorksheetColumn().ColumnLetter();
    }
    return null;
}