Intellectual capital, for one, provides a human resources perspective by means of which the relationship this query refers to might be investigated. Aggregated intellectual capital comprises (a) human capital (aka intellect); (b) relational (or customer) capital (aka relationships); and (c) structural (or organizational) capital (aka routines). It is assuredly possible to shine a light on the intersection of marketing knowledge management and customer loyalty by investigating relational capital. To wit, this would invite consideration of, say, strategic partnerships, product and service quality, product and service reliability, customer and supplier relations, promotion, marketing, branding, outsourcing, client focus, client data and information, distribution channels, internet resources, etc.
Marketing entices a customer with uniques superior experience of a product or service for repeated purchases to make a profit, grow, and expand by out-competing others.
It is the way you manage your customers that result in customers loyalty. To manage customers, you need customers management system (CRM) to which customers; knowledge management is part.
This seems like a good candidate for empirical study. You can propose a theoretical research model based on the review of current marketing and knowledge management literature and test the hypothesised relationships to find out significant ones.
Marketing knowledge about customers contribute to the succees of whatever marketing a company is undertaking. Loyalty or return customers are more important variables to know and understand. How to track them and rationalise their behavior is important to the success of any marketing campaign.