\ddagger

The double dagger symbol, often used to denote a footnote or reference that is secondary to the primary footnote marked by a single dagger.

Examples

Indicating a special or secondary notation for x.

x^{\ddagger}

Referencing a secondary note related to Table 1.

\text{See Table 1\ddagger}

Listing items with secondary footnotes or annotations.

a\ddagger, b\ddagger, c\ddagger