Yes, per the rules for
Imperial Knights detachments and stratagems in Codex Imperial Knights,
An IMPERIAL KNIGHTS Detachment is one that only includes models with the IMPERIAL KNIGHTS keyword (excluding models with the AGENT OF THE IMPERIUM or UNALIGNED keyword).
If your army includes any IMPERIAL KNIGHTS Detachments, you have access to these Stratagems, and can spend CPs to use them. When one of these Stratagems instructs you to select a unit from your army, replace all instances of <NOBLE HOUSEHOLD> on that Stratagem (if any) with the name of the noble household that your selected unit is drawn from (if the selected unit is a FREEBLADE, replace all instances of <NOBLE HOUSEHOLD> on that Stratagem (if any) with FREEBLADE instead).