Perhaps you should try some spelling variations:
"jacobus fenwick van 't hopf" » "jacobus merrick van 't hopf", "jacobus henricus van 't hopf", "jacobus fenwick bar 't hopf", "jacobus fenwick has 't hopf", "jacobus fenwick john 't hopf"
"jacobus fenwick alan 't hopf" » "jacobus merrick alan 't hopf", "jacobus henricus alan 't hopf", "jacobus renwick alan 't hopf", "jacobus fenwick colin 't hopf", "jacobus fenwick john 't hopf"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"jacobus fenwick van 't hopf\") OR (\"jacobus fenwick alan 't hopf\"))".
• Removing quotes may allow a broader search: (( jacobus fenwick van 't hopf ) OR ( jacobus fenwick alan 't hopf )).
• Adding a wildcard symbol may retrieve word variants: (("jacobus fenwick van 't hopf") OR ("jacobus fenwick alan 't hopf"))*.