Under high‐pressure high‐temperature conditions, the title compounds with 4, 5, 6, or 8 SiSi contacts are formed. The interatomic distances can be scaled to the number of homonuclear neighbors in the silicide framework. Analysis of the chemical bonding reveals multicenter bonds between metal and Si atoms (see figure for CeSi5: Si blue and green, Ce red) and a contribution of semi‐core states (the penultimate shell) of Ce to the chemical bonding.