Confirm names German airmen fallen in Spain

[Agustin Ruzafa]

Good afternoon, we are preparing an investigation into plane crash in Spain and I need to confirm where possible the crew:

21/12/1941
Fw200C-3/U4 (KF+QM)(F8+FH) W.Nr. 0073 crash in Ramales (Santander)
MEESSEN, ALBERT
OBERMEYER, MICHAEL
RIGWALSKI, ERWIN
SCHARER, HANS
SCHREYER, HERBERT
WATKINSON, WOLFGANG

21/02/1943
Junkers Ju88D-1 (F6+IH) W.Nr. 430492 del1(F)/122
PETERS, SIGMUND
SCHERP, HERMANN
ÜEFFING, HANS

01/04/1944
Dornier Do217 E-5 del III/Kg40
BOCKLER, JOHANNES
BRÜHL, PETER

11/05/1944
Junkers Ju88 in Cape Llentrisca (Ibiza)
KEMNITZER, FRITZ
SOWINSKI, HEINZ
ZENK, JOSEF

31/05/1944
Junkers Ju290A-7 (KR+LR)(9V+LK) in Brañuela, Posada de Llanes (Asturias)
BARTOSCHEWSKI, KURT
BORKOWSKI, OTTO
BORNTRINK, WALTER
ERNST, HEINZ
HABERER, HANS
HERTZ, WOLFGANG
JANKE, ALFRED
NEUMANN, PAUL
SCHAMAHLFELDT, WILLI
STEINBOCK, MARTIN
STROBEL, FRIEDRICH

December 1.943
Junkers Ju290A-3 (SB+QK) (also PI+PO, 9V+DK) in Lesaca (Navarra)
KRAUSE, HELMUT
MÜLLER, WALTER
NEUENFELDT, HORST
SIR, WALTER
SURECK, RUDI

24/03/1.944
Junkers Ju88 A4 0967 in Enviny (Lleida)
There was one unidentified dead buried in Enviny and then transferred to Cuacos de Yuste, would you know the name?

What we need is that in these aircraft was the crew that date assume that might be, but we have no way of confirming. Thank you very much for your help
Greetings
Agustin Ruzafa