Medlands says this for her on the BURGUNDY page:
A relative of Rudolf III King of Burgundy, the precise relationship is unknown:
1. KUNIZA . She is recorded in Europäische Stammtafeln as neptis of RUDOLF III King of Burgundy[245] but the primary source on which this statement is based has not yet been identified. 1038. m GERHARD [I] Graf von Egisheim, son of HUGO [VIII] Graf im Nordgau und zu Egisheim & his wife Heilwig --- (-killed in battle 1038).
The explanation on the ALSACE page (her husband's family) is sightly differently worded:
m KUNIZA, neptis of RUDOLF III King of Burgundy, daughter of ---. She is recorded in Europäische Stammtafeln as neptis of RUDOLF III King of Burgundy[232] but the primary source on which this statement is based has not yet been identified.
My limited Latin vocabulary (aka Google) tells me neptis=grand daughter