tcpdf tamil unicode மரபு wrongly print as மரபீ

Question

tdpdf Tamil Unicode printing issue:
Trying multiple Unicode fonts like freesans, freeserif, latha.
But the Tamil word மரபு wrongly print as மரபீ (Marabu as Marabee).

$x=5;
$pdf->SetFont('latha', 'N', 10);
$pdf->SetFont('freesans', 'N', 10);
$pdf->SetFont('freeserif', 'N', 10);
$pdf->MultiCell(170,4, 'தமிழர் மரபு','R','L',0,0,$x+30,$y,true,0,false,false,0,'M',false);

Print as தமிழர் மரபீ instead of தமிழர் மரபு